As filed with the U.S. Securities and Exchange Commission on September 24, 2015

Registration No. 333-206312

UNITED STATES

SECURITIES
AND EXCHANGE COMMISSION

Washington, D.C. 20549

Amendment
No. 2 To

FORM S-1

REGISTRATION STATEMENT

UNDER

THE SECURITIES ACT
OF 1933

PURE STORAGE, INC.

(Exact name of registrant as specified in its charter)

Delaware

3572

27-1069557

(State or other jurisdiction of

incorporation or organization)

(Primary Standard Industrial

Classification Code Number)

(I.R.S. Employer

Identification Number)

650 Castro Street, Suite 400

Mountain View, California 94041

(800) 379-7873

(Address,
including zip code, and telephone number, including area code, of registrants principal executive offices)

Scott Dietzen

Chief Executive Officer

Pure Storage, Inc.

650
Castro Street, Suite 400

Mountain View, California 94041

(800) 379-7873

(Name,
address, including zip code, and telephone number, including area code, of agent for service)

Copies to:

Mark P. Tanoury

John T. McKenna

Seth J.
Gottlieb

Cooley LLP

3175 Hanover Street

Palo Alto, California 94304

(650) 843-5000

Joseph FitzGerald

Vice President & General Counsel

Todd Wheeler

Pure
Storage, Inc.

650 Castro Street, Suite 400

Mountain View, California 94041

(800) 379-7873

Alan F. Denenberg

Davis Polk & Wardwell LLP

1600 El Camino Real

Menlo Park, California 94025

(650) 752-2000

Approximate date of commencement of proposed sale to the public: As soon as practicable after the effective date of this Registration Statement.

If any of the securities being registered on this Form are to be offered on a delayed or continuous basis pursuant to Rule 415 under the
Securities Act of 1933, check the following box. ¨

If this Form is filed to register
additional securities for an offering pursuant to Rule 462(b) under the Securities Act, check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering. ¨

If this Form is a post-effective amendment filed pursuant to Rule 462(c) under the Securities
Act, check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering. ¨

If this Form is a post-effective amendment filed pursuant to Rule 462(d) under the Securities Act, check the following box and list the
Securities Act registration statement number of the earlier effective registration statement for the same offering. ¨

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller
reporting company. See the definitions of large accelerated filer, accelerated filer and smaller reporting company in Rule 12b-2 of the Exchange Act. (Check one):

Large accelerated filer ¨

Accelerated filer ¨

Non-accelerated filer þ

Smaller reporting company ¨

(Do not check if a smaller reporting company)

CALCULATION OF REGISTRATION FEE

Title of Each Class of Securities

to be Registered

Amount to beRegistered(1)

Proposed MaximumOffering Price PerShare(2)

Proposed MaximumAggregate OfferingPrice(1)(2)

Amount ofRegistration Fee(3)

Class A common stock, $0.0001 par value per share

28,750,000

$18.00

$517,500,000

$60,134

(1)

Includes the additional shares that the underwriters have the right to purchase from the Registrant.

(2)

Estimated solely for the purpose of computing the amount of the registration fee pursuant to Rule 457(a) under the Securities Act of 1933, as amended.

(3)

The Registrant previously paid a registration fee of $34,860 in connection with the initial filing of this Registration Statement.

The Registrant hereby amends this Registration Statement on such date or dates as may be necessary to delay its effective date until the
Registrant shall file a further amendment which specifically states that this Registration Statement shall thereafter become effective in accordance with Section 8(a) of the Securities Act of 1933, as amended, or until the Registration
Statement shall become effective on such date as the Securities and Exchange Commission acting pursuant to said Section 8(a), may determine.

The information in this prospectus is not complete and may be changed. We may not sell
these securities until the registration statement filed with the Securities and Exchange Commission is effective. This prospectus is not an offer to sell these securities and we are not soliciting offers to buy these securities in any jurisdiction
where the offer or sale is not permitted.

PROSPECTUS (Subject to Completion)

Issued September 24, 2015

25,000,000 Shares

CLASS A COMMON STOCK

Pure Storage, Inc. is
offering 25,000,000 shares of its Class A common stock. This is our initial public offering and no public market currently exists for our shares of Class A common stock. We anticipate that the initial public offering price will be between
$16.00 and $18.00 per share.

We have two classes of
authorized common stock, Class A common stock and Class B common stock. The rights of the holders of Class A common stock and Class B common stock are identical, except with respect to voting and conversion. Each share of Class A
common stock is entitled to one vote. Each share of Class B common stock is entitled to ten votes and is convertible into one share of Class A common stock. Outstanding shares of Class B common stock will represent approximately 98.5% of the
voting power of our outstanding capital stock immediately following this offering, with our directors, executive officers and principal stockholders representing approximately 59.9% of such voting power.

Our Class A common stock has been approved for listing on the New York Stock Exchange under the trading symbol PSTG.

We are an emerging growth company as defined under the federal securities laws. Investing in our Class A common stock involves risks.
See Risk Factors beginning on page 10.

PRICE $ A SHARE

Price to

Public

UnderwritingDiscounts andCommissions(1)

Proceeds toPure Storage

Per share

$

$

$

Total

$

$

$

(1)

See Underwriting for a description of the compensation payable to the underwriters.

We have granted the underwriters the right to purchase up to an additional 3,750,000 shares of Class A common stock to cover over-allotments.

The Securities and Exchange Commission and state securities regulators have not approved or disapproved of these securities, or determined if this
prospectus is truthful or complete. Any representation to the contrary is a criminal offense.

The underwriters expect to deliver the shares of
Class A common stock to purchasers on , 2015.

We are
responsible for the information contained in this prospectus and in any free writing prospectus we prepare or authorize. We have not authorized anyone to provide you with different information, and we take no responsibility for any other information
others may give you. Neither we nor the underwriters are making an offer to sell these securities in any jurisdiction where the offer or sale is not permitted. You should not assume that the information contained in this prospectus is accurate as of
any date other than the date on the cover of this prospectus. Our business, financial condition, results of operations and future growth prospects may have changed since that date.

Persons who come into possession of this prospectus and any applicable free writing prospectus in jurisdictions outside the United States are
required to inform themselves about and to observe any restrictions as to this offering and the distribution of this prospectus and any such free writing prospectus applicable to that jurisdiction.

Until , 2015
(the 25th day after the date of this prospectus), all dealers that buy, sell or trade shares of our Class A common stock, whether or not participating in this offering, may be required to deliver a prospectus. This delivery is in addition
to a dealers obligation to deliver a prospectus when acting as an underwriter and with respect to their unsold allotments or subscriptions.

This summary highlights information contained elsewhere in this prospectus. This summary is not complete and does not contain all the
information you should consider before investing in our Class A common stock. You should read this entire prospectus carefully, especially the risks of investing in our Class A common stock discussed under the heading Risk
Factors, and our consolidated financial statements and related notes included elsewhere in this prospectus before making an investment decision. Except as otherwise indicated herein or as the context otherwise requires, references in this
prospectus to Pure Storage, Pure, the company, we, us and our refer to Pure Storage, Inc. and its wholly-owned subsidiaries.

PURE STORAGE, INC.

Overview

Our mission is to deliver data storage that transforms business through a dramatic increase in performance and reduction in complexity and
costs. Our innovative technology replaces storage systems designed for mechanical disk with all-flash systems optimized end-to-end for solid-state memory. At the same time, our innovative business model replaces the traditional forklift upgrade
cycle with an evergreen storage model of hardware and software upgrades and maintenance.

Our next-generation storage platform and
business model are the result of our teams substantial experience in enterprise storage and web-scale infrastructure, as well as frustration with the industrys status quo. This deep industry understanding led to the development of our
three-part integrated platform: the Purity Operating Environment, our flash-optimized software, FlashArray, our modular and scalable all-flash array hardware, and Pure1, our cloud-based management and support. Our platform can
deliver a 10X acceleration in business applications over legacy disk-based storage. It is also designed to be compatible with existing infrastructure, substantially more reliable and power and space efficient.

Our business model builds on our technology innovations to reverse the traditional storage business model. Instead of moving data between old
and new systems via forklift upgrades, we keep business data and applications in place and upgrade technology around it. Our platform and business model are designed to add value to customers for a decade or more, reducing total cost of storage
ownership while increasing loyalty.

Our innovations help rebalance the datacenter by closing the performance gap between legacy storage
technology and servers and networks. But it is the simplicity of our platform and business model that is revolutionizing the enterprise storage experience. Together, our innovations have helped our customers realize the promise of the cloud model
for IT and the benefits of Moores Law. This has yielded industry-leading Net Promoter scores, based on the results of customer satisfaction surveys we conducted.

Since launching FlashArray in May 2012, our customer base has grown to over 1,100 customers. Our customers include large and mid-size
organizations across a diverse set of industry verticals, including cloud-based software and service providers, consumer web, education, energy, financial services, governments, healthcare, manufacturing, media, retail and telecommunications. Our
platform is used for a broad set of storage use cases, including database applications, private and public cloud infrastructure, virtual server infrastructure and virtual desktop infrastructure. Our platform helps customers increase employee
productivity, improve operational efficiency, make better decisions through faster, more accurate analytics and deliver more compelling user experiences to their customers and partners.

We sell our platform predominantly through a high touch, channel-fulfilled model. Our sales force works collaboratively with our global
network of distribution and channel partners, which provides us broad sales reach while maintaining direct customer engagement.

Pure Storage serves the market for enterprise storage and related storage software.
According to IDC, the combined worldwide spend by enterprises on external storage hardware priced at more than $50,000 per array and storage and device management, storage infrastructure and storage replication software is estimated to grow from
approximately $24.2 billion in 2014 to $27.0 billion in 2018. We believe the benefits of next-generation flash storage will drive flash to ultimately become the predominant form of primary enterprise storage and present a broad market
opportunity.

This market opportunity is reflected in our rapid growth. Our revenue increased from $6.1 million for the fiscal year ended
January 31, 2013 to $42.7 million for the fiscal year ended January 31, 2014 and to $174.5 million for the fiscal year ended January 31, 2015, representing year-over-year revenue growth of 603% and 308% for our two most recent
fiscal years. Our revenue increased from $59.4 million for the six months ended July 31, 2014 to $158.7 million for the six months ended July 31, 2015, representing period-over-period growth of 167% for our most recent interim
period. Our net loss was $23.4 million, $78.6 million, and $183.2 million for the fiscal years ended January 31, 2013, 2014 and 2015, respectively and $95.2 million and $113.0 million for the six months ended July 31, 2014
and 2015, respectively. For the fiscal year ended January 31, 2015 and the six months ended July 31, 2015, 77% and 78% of our revenue was from the United States and 23% and 22% from the rest of the world, respectively.

Industry Background

Technology continues
to transform businessredefining how products and services are built, how customers and partners are served and how organizations innovate. As a result, organizations face the urgent need to operate with greater speed and to leverage technology
to be smarter and more innovative. Indeed, the speed, agility and efficiency of an organizations information systems contribute to and in many cases define competitive advantage.

Organizations must make technology investments that improve IT performance and in parallel reduce the cost and complexity of their operations.
Technology that can quickly adapt to ever-changing requirements and drive these dual and seemingly opposed requirements of improving both performance and efficiency is essential.

Business Transformation through Improved Performance. The speed
of servers and networks has dramatically improved over the past several decades, but the performance of disk-based storage has not kept up. Disk-based storage is now an obstacle to application performance.

Flash memory is a solid-state storage technology that can eliminate the storage bottleneck, while providing better performance, greater
storage density and improved power efficiency as compared to disk. Flash memory has transformed todays consumer technology experienceit is the storage media inside smartphonesand it is now time for business to enjoy those same
benefits. The price performance of flash technology also has improved dramatically in recent years. Already, leading web-scale companies such as Apple, Facebook and Google are utilizing flash-based storage in their datacenters.

Even when retrofitted with flash, legacy approaches to storage generally fall short. Too often, they rely on legacy storage software, which
was optimized for the serial and sequential read and write patterns of disk. They do not take full advantage of the parallelizable and random access nature of flash. Even modern hybrid storage approachesthose that pair flash and disk
designsare inadequate, as they suffer from the speed of the far slower disk operations.

IT Transformation
through Reduced Costs and Complexity. Cloud computing has been one of the more compelling IT advances in years. Today, organizations use shared
resources in the cloud, significantly reducing the cost and complexity of operations and datacenters. Organizations around the world are now adopting many of the core tenets of this cloud model to transform their own operations and datacenters.

Legacy disk-based storage is generally inconsistent with the design tenets of the cloud. It
does not scale easily, and is complex and costly to manage, often requiring expert consultants for routine operations. Most legacy disk-based storage requires organizations to replace their storage systems every 3 to 5 years. This is expensive and
worrisome for customers, who must juggle upgrades and downtime during the data migration period. The result is an endless and time-consuming cycle of procurement, provisioning and troubleshooting of data storage.

Next-Generation Storage. With the increased demands of a complex
and changing business environment, we believe organizations not only desire but also require a new storage platform that combines the following:



Dramatically improved performance to keep up with the demands of the business;

Seamless interoperability for compatibility with existing IT infrastructure investments;



Simplicity, agility, easy automation and elasticity to enable the cloud model of IT; and



Greater price performance and reduced total cost of ownership.

Our Solution

Pure Storage is defining the next generation of enterprise data storage. We have pioneered the all-flash array category and have coupled that
with our customer-centric business model. We believe that our approach is having a profound impact both on our customers and the data storage industry as a whole:



Business Transformation.With Pure Storage, customers business applications run fasterhelping them to improve yields, employee productivity and customer and partner experiences, allowing
them to make smarter decisions, and enabling them to increase innovation across their organizations.



Technology Transformation. Our platform increases the efficiency, agility and simplicity of IT infrastructure, enabling our customers to reduce the cost and complexity of operations and implement the cloud
model.

The following differentiates our storage platform:



High Performance. Our FlashArray and Purity Operating Environment software were specifically architected for the fast parallelizable and random access of flash. The result is that customers
can eliminate more than one year of cumulative application latency every month as compared to legacy disk-based storage in typical deployments.



Enterprise Resiliency. Our platform, through the Purity Operating Environment, enables customers to maintain continuous access to their data without a loss in performance, even in the event of
hardware or software component failures or during upgrades.



Simplicity. Our platform is simple to deploy, manage and upgrade for a wide variety of customer use casesthe basic operating commands fit on a single, folding business card. Our platform is designed
to seamlessly integrate with existing investments in server and application infrastructure.



Agile Management. Through Pure1, we deliver an integrated cloud-based management and support experience. We originate most of the support interactions we have with our customers, consistent with our
proactive focus on helping our customers quickly respond to issues and stay ahead of changes to their storage requirements.



Evergreen Storage. Our platform is designed to support customer deployments for a decade or more. Through our innovative business model, we provide software updates, any needed hardware replacements, and a
controller refresh every three years so the customer can run the latest Purity Operating Environment for predictable maintenance fees.

Compelling Economics. Our FlashReduce software, combined with consumer-grade flash memory, allows customers to achieve price-performance levels that enable our platform to be deployed across a wide
range of use cases.



Lower Total Cost of Ownership. Our platform reduces the space, power, cooling, management overhead and other associated expenses as compared to disk-based storage.

Growth Strategies

Key elements of our
growth strategy include:



Relentlessly Innovate and Maintain Technology Leadership. We will continue to invest in product innovation and technology leadership and plan to enhance our flash-optimized software, modular and scalable
hardware and cloud-based management and support.



Continue to Drive Large Customer Adoption. We intend to grow our base of customers, including large customers, by promoting our platform, increasing our investment in sales and marketing and leveraging our
network of channel partners.



Further Leverage our Channel Ecosystem. We intend to continue investing in training, demand generation and partner programs. We also believe we can enable many of our partners to independently identify,
qualify, sell and upgrade customers, with limited involvement from us.



Drive Greater Penetration into our Existing Customer Base. We believe our over 1,100 customers represent a significant opportunity for us to realize incremental sales. We sell additional products and
services to our customers as the data within their existing application deployments naturally grows and as customers migrate additional applications to our platform.



Cultivate our Inspirational Culture. We believe our culture is a critical part of our success. We strive to maintain an exciting and supportive atmosphere that attracts great
talent and inspires our employees to excel and deliver a differentiated experience for our customers.



Leverage our Technology Ecosystem. We will continue to develop strategic relationships with technology vendors to allow integration of our platform with their offerings, enabling a streamlined experience
for our customers.

Risks Associated with Our Business

Our business is subject to numerous risks and uncertainties including those highlighted in the section titled Risk Factors
immediately following this prospectus summary. These risks include, among others, the following:



We have experienced rapid growth in recent periods, and we may not be able to sustain or manage future growth effectively.



We intend to continue focusing on revenue growth and increasing our market penetration and international presence at the expense of near-term profitability by investing heavily in our business.



We have a limited operating history, which makes our future operating results difficult to predict.



The market for all-flash storage products is rapidly evolving, which makes it difficult to forecast customer adoption rates and demand for our products.



We face intense competition from a number of established companies and new entrants.



Many of our established competitors have long-standing relationships with key decision makers at many of our current and prospective customers, which may inhibit our ability to compete effectively and maintain or
increase our market share.

Our ability to increase our revenue will substantially depend on our ability to attract, motivate and retain sales, engineering and other key personnel, including our management team, and any failure to attract,
motivate and retain these employees could harm our business, operating results and financial condition.



If we fail to adequately expand our sales force, our growth will be impeded.



The success of our business depends in part on our ability to protect and enforce our intellectual property rights.

If we are unable to adequately address these and other risks we face, our business, financial condition, operating results and prospects may
be adversely affected.

Emerging Growth Company Status

We are an emerging growth company as defined in the Jumpstart Our Business Startups Act, or the JOBS Act, enacted in April 2012,
and therefore we intend to take advantage of certain exemptions from various public company reporting requirements, including not being required to have our internal control over financial reporting audited by our independent registered public
accounting firm pursuant to Section 404(b) of the Sarbanes-Oxley Act of 2002, reduced disclosure obligations regarding executive compensation in our periodic reports and proxy statements, exemptions from the requirements of holding a nonbinding
advisory vote on executive compensation and any golden parachute payments not previously approved. We may take advantage of these exemptions for up to five years or until we are no longer an emerging growth company, whichever is earlier.

Corporate Information

We were
incorporated in Delaware in October 2009 as OS76, Inc. In January 2010, we changed our name to Pure Storage, Inc. Our principal executive offices are located at 650 Castro Street, Suite 400, Mountain View, California 94041, and our telephone number
is (800) 379-7873. Our website address is www.purestorage.com. Information contained on or accessible through our website is not a part of this prospectus and the inclusion of our website address in this prospectus is an inactive textual
reference only.

Pure Storage, the P logo, Purity Operating Environment, FlashArray, Pure1 and other trade names,
trademarks or service marks of Pure Storage appearing in this prospectus are the property of Pure Storage. Trade names, trademarks and service marks of other companies appearing in this prospectus are the property of their respective holders.

Total Class A and Class B common stock to be outstanding after this offering

185,056,764 shares

Over-allotment option of Class A common stock offered

3,750,000 shares

Voting rights

We have two classes of authorized common stock: Class A common stock and Class B common stock. The rights of the holders of Class A and
Class B common stock are identical, except with respect to voting and conversion rights. The holders of Class A common stock are entitled to one vote per share, and the holders of Class B common stock are entitled to ten votes per
share, on all matters that are subject to stockholder vote. Following this offering, each share of Class B common stock may be converted into one share of Class A common stock at the option of the holder thereof, and will be converted into
one share of Class A common stock upon transfer thereof, subject to certain exceptions. See Description of Capital Stock for additional information.

Use of proceeds

We estimate that the net proceeds from this offering will be approximately $395.2 million, based on an assumed initial
public offering price of $17.00 per share, the midpoint of the price range set forth on the cover page of this prospectus, after deducting underwriting discounts and commissions and estimated offering expenses payable by us.

We intend to use the net proceeds from this offering primarily for
general corporate purposes, including expansion of our product development and sales and marketing organizations. We may also use a portion of the net proceeds from this offering for acquisitions of, or investments in, technologies, solutions or
businesses that complement our business, although we have no commitments or agreements to enter into such acquisitions or investments. See Use of Proceeds for additional information.

The number of shares of Class A and Class B common stock to be outstanding after
this offering is based on no shares of our Class A common stock and 160,056,764 shares of our Class B common stock outstanding as of July 31, 2015, and excludes:



59,928,620 shares of Class B common stock issuable upon the exercise of outstanding stock options as of July 31, 2015 under our 2009 Equity Incentive Plan with weighted-average exercise price of $4.53 per
share;



15,102,581 shares of Class B common stock reserved for future issuance under our 2009 Equity Incentive Plan as of July 31, 2015, of which stock options to purchase an aggregate of 9,174,999 shares of
Class B common stock were granted subsequent to July 31, 2015, with an exercise price of $17.00 per share; all shares reserved for future issuance and not subject to an outstanding stock option will cease to be available for issuance at
the time our 2015 Equity Incentive Plan becomes effective in connection with this offering;



700,000 shares of Class B common stock that we issued in September 2015 to the Pure Good Foundation;



27,000,000 shares of Class A common stock reserved for future issuance under our 2015 Equity Incentive Plan, as well as any automatic increases in the number of shares of Class A common stock reserved for
future issuance under this plan, which will become effective upon the execution of the underwriting agreement for this offering; and



3,500,000 shares of Class A common stock reserved for future issuance under our 2015 Employee Stock Purchase Plan, as well as any automatic increases in the number of shares of Class A common stock
reserved for future issuance under this plan, which will become effective upon the execution of the underwriting agreement for this offering.

In addition, unless we specifically state otherwise, all information in this prospectus assumes:



that our amended and restated certificate of incorporation, which we will file in connection with the closing of this offering, and our amended and restated bylaws adopted in connection with this offering are effective;



the conversion of all outstanding shares of our preferred stock into an aggregate of 122,280,679 shares of Class B common stock immediately upon the closing of this offering;



no exercise of outstanding options; and



no exercise by the underwriters of their right to purchase up to an additional 3,750,000 shares of Class A common stock to cover over-allotments.

The following tables summarize our consolidated financial data. We have derived the consolidated statements of operations data for the fiscal
years ended January 31, 2014 and 2015 from our audited financial statements included elsewhere in this prospectus. The selected consolidated statements of operations data for the fiscal year ended January 31, 2013 are derived from our
unaudited consolidated financial statements not included in this prospectus. We have derived the selected consolidated financial statements of operations data for the six months ended July 31, 2014 and 2015 and consolidated balance sheet data
as of July 31, 2015 from our unaudited consolidated financial statements included elsewhere in the prospectus. The unaudited consolidated financial statements were prepared on a basis consistent with our audited financial statements. Our
historical results are not necessarily indicative of the results that may be expected in the future and our results for the six months ended July 31, 2015 are not necessarily indicative of the results that may be expected for the full fiscal
year.

You should read this data together with our consolidated financial statements and related notes appearing elsewhere in this
prospectus and the sections titled Selected Consolidated Financial Data and Managements Discussion and Analysis of Financial Condition and Results of Operations.

Fiscal Year EndedJanuary 31,

Six Months EndedJuly 31,

2013

2014

2015

2014

2015

(unaudited)

(in thousands, except per share data)

Consolidated Statements of Operations Data:

Revenue:

Product

$

5,474

$

39,228

$

154,836

$

53,253

$

134,810

Support

603

3,505

19,615

6,159

23,928

Total revenue

6,077

42,733

174,451

59,412

158,738

Cost of revenue:

Product(1)

3,605

19,974

63,425

22,608

50,353

Support(1)

709

4,155

14,127

4,924

14,421

Total cost of revenue

4,314

24,129

77,552

27,532

64,774

Gross profit

1,763

18,604

96,899

31,880

93,964

Operating expenses:

Research and development(1)

12,383

36,081

92,707

40,533

69,870

Sales and marketing(1)

10,727

54,750

152,320

71,563

107,844

General and administrative(1)

2,017

5,902

32,354

14,419

27,919

Total operating expenses

25,127

96,733

277,381

126,515

205,633

Loss from operations

(23,364

)

(78,129

)

(180,482

)

(94,635

)

(111,669

)

Other income (expense), net

(6

)

(141

)

(1,412

)

(307

)

(1,074

)

Loss before provision for income taxes

(23,370

)

(78,270

)

(181,894

)

(94,942

)

(112,743

)

Provision for income taxes

2

291

1,337

257

214

Net loss

$ (23,372

)

$

(78,561

)

$

(183,231

)

$

(95,199

)

$

(112,957

)

Net loss per share attributable to common stockholders, basic and
diluted(2)

$

(1.28

)

$

(3.24

)

$

(6.56

)

$

(3.66

)

$

(3.41

)

Weighted-average shares used in computing net loss per share attributable to common stockholders, basic and diluted(2)

18,239

24,237

27,925

25,976

33,154

Pro forma net loss per share attributable to common stockholders, basic and
diluted(2)

$

(1.26

)

$

(0.73

)

Weighted-average shares used in computing pro forma net loss per share attributable to common stockholders, basic and diluted(2)

Stock-based compensation expense for the fiscal years ended January 31, 2014 and 2015 and the six months
ended July 31, 2014 included $13.3 million, $27.6 million, and $27.6 million, respectively, of cash paid for the repurchase of common stock in excess of fair value. See Note 9 to our consolidated financial statements for additional information.

(2)

See Note 10 to our consolidated financial statements for an explanation of the method used to calculate our actual and pro forma basic and diluted net loss per share attributable to common stockholders and the
weighted-average number of shares used in the computation of the per share amounts.

As of July 31, 2015

Actual

ProForma(1)

Pro FormaAsAdjusted(2)(3)

(unaudited)

(in thousands)

Consolidated Balance Sheet Data:

Cash and cash equivalents

$

128,282

$

128,282

$

523,482

Working capital

147,554

147,554

542,754

Total assets

336,563

336,563

731,763

Deferred revenue, current and noncurrent portion

123,482

123,482

123,482

Convertible preferred stock

543,940





Total stockholders (deficit) equity

(388,028

)

155,912

551,112

(1)

The pro forma column reflects the conversion of all outstanding shares of convertible preferred stock into 122,280,679 shares of Class B common stock immediately upon the closing of this offering.

(2)

The pro forma as adjusted column further reflects the receipt of $395.2 million in net proceeds from our sale of shares of Class A common stock in this offering at an assumed initial public offering price of $17.00
per share, the midpoint of the price range set forth on the cover page of this prospectus, after deducting underwriting discounts and commissions and estimated offering expenses payable by us.

(3)

Each $1.00 increase or decrease in the assumed initial public offering price of $17.00 per share would increase or decrease, respectively, the amount of cash and cash equivalents, working capital, total assets and total
stockholders (deficit) equity by $23.5 million, assuming the number of shares offered by us, as set forth on the cover page of this prospectus, remains the same and after deducting underwriting discounts and commissions and estimated offering
expenses payable by us. We may also increase or decrease the number of shares we are offering. An increase or decrease of 1,000,000 in the number of shares we are offering would increase or decrease, respectively, the amount of cash and cash
equivalents, working capital, total assets and total stockholders (deficit) equity by approximately $16.0 million, assuming the assumed initial public offering price per share, as set forth on the cover page of this prospectus, remains the
same after deducting underwriting discounts and commissions. The pro forma as adjusted information is illustrative only, and we will adjust this information based on the actual initial public offering price and other terms of this offering
determined at pricing.

Investing in our Class A common stock involves a high degree of risk. You should carefully consider the risks and uncertainties
described below, together with all of the other information contained in this prospectus, including our consolidated financial statements and the related notes appearing at the end of this prospectus, before deciding to invest in our Class A
common stock. If any of the following risks actually occur, it could harm our business, prospects, operating results and financial condition. In such event, the trading price of our Class A common stock could decline and you might lose all or
part of your investment.

Risks Related to Our Business and Industry

We have experienced rapid growth in recent periods, and we may not be able to sustain or manage future growth effectively.

We have significantly expanded our overall business, customer base, headcount, channel partner relationships and operations in recent periods,
and we anticipate that we will continue to expand and may experience rapid growth in future periods. For example, from January 31, 2014 to January 31, 2015, our headcount increased from over 350 to over 800 employees, and to over
1,100 employees as of July 31, 2015. Our future operating results will depend to a large extent on our ability to successfully manage our anticipated expansion and growth. To manage our growth successfully, we believe that we must, among other
things, effectively:

We expect that
our future growth will continue to place a significant strain on our managerial, administrative, operational, financial and other resources. We will incur costs associated with this future growth prior to realizing the anticipated benefits, and the
return on these investments may be lower, may develop more slowly than we expect or may never materialize. If we are unable to manage our growth effectively, we may not be able to take advantage of market opportunities or develop new products or
enhancements to existing products in a timely manner, and we may fail to satisfy customers expectations, maintain product quality, execute on our business plan or adequately respond to competitive pressures, each of which could adversely
affect our business and operating results.

We intend to continue focusing on revenue growth and increasing our market penetration and international
presence at the expense of near-term profitability by investing heavily in our business.

Our strategy is to increase our
investments in marketing, sales, support and research and development at the expense of near-term profitability. We believe our decision to continue investing heavily in our business will be critical to our future success. We anticipate that our
operating costs and expenses will increase substantially for the foreseeable future. In addition, we expect to incur significant legal, accounting and other expenses that we did not incur as a private company. Even if we achieve significant revenue
growth, we may continue to experience losses, similar or greater than to those we have incurred historically.

We have not achieved profitability for any fiscal year since our inception. We incurred a net
loss of approximately $183.2 million for the fiscal year ended January 31, 2015 and $113.0 million for the six months ended July 31, 2015, and we had an accumulated deficit of $341.6 million and $454.5 million as of
January 31, 2015 and July 31, 2015, respectively. Our operating expenses largely are based on anticipated revenue, and a high percentage of our expenses are, and will continue to be, fixed in the short term. If we fail to adequately
increase revenue and manage costs, we may not achieve or maintain profitability in the future. As a result, our business could be harmed and our operating results could suffer.

We have a limited operating history, which makes our future operating results difficult to predict.

We were founded in October 2009, but have generated substantially all of our revenue since February 1, 2013. We have a limited operating
history in an industry characterized by rapid technological change, changing customer needs, evolving industry standards and frequent introductions of new products and services. Our limited operating history makes it difficult to evaluate our
current business and our future prospects, including our ability to plan for and model future growth. All of these factors make our future operating results difficult to predict, which may impair our ability to manage our business and reduce your
ability to assess our prospects.

You should not consider our revenue growth in prior quarterly or annual periods as indicative of our
future performance. In future periods, we do not expect to achieve similar percentage revenue growth rates as we have achieved in some past periods. If we are unable to maintain adequate revenue or revenue growth, our stock price could be volatile,
and it may be difficult to achieve and maintain profitability.

The market for all-flash storage products is rapidly evolving, which makes it
difficult to forecast customer adoption rates and demand for our products.

The market for all-flash storage products is
rapidly evolving. As a result, our future financial performance will depend on the continued growth of this market and on our ability to adapt to emerging customer demands and trends. Sales of our products are currently focused on use cases that
require performance storage products such as virtualization and transaction processing. Many of our target customers have never purchased all-flash storage products and may not have the desire or available budget to invest in a new technology such
as ours. It is difficult to predict with any precision customer adoption rates, customer demand for our products or the future growth rate and size of our market. Our products may never reach mass adoption, and changes or advances in alternative
technologies or adoption of cloud storage offerings not utilizing our storage platform could adversely affect the demand for our products. Further, although flash storage has a number of advantages as compared to other data storage alternatives,
such as hard disk drives, flash storage has certain limitations as well, including a higher price per gigabyte of raw storage, more limited methods for data recovery and reduced performance gains for certain uses, including sequential input/output,
or I/O, transactions. A slowing in or reduced demand for all-flash storage products caused by lack of customer acceptance, technological challenges, alternative technologies and products or otherwise would result in a lower revenue growth rate or
decreased revenue, either of which would negatively impact our business and operating results.

We face intense competition from a number of
established companies and new entrants.

We face intense competition from a number of established companies that sell
competitive storage products. These competitors include Dell, EMC, HP, Hitachi Data Systems, IBM, Lenovo and NetApp. These competitors, as well as other potential competitors, may have:

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greater name recognition and longer operating histories;

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larger sales and marketing and customer support budgets and resources;

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broader distribution and established relationships with distribution partners and customers;

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the ability to bundle storage products with other products and services to address customers requirements;

We also face competition from
a number of other companies, one or more of which may become significant competitors in the future. New competitors could emerge and acquire significant market share. All of our competitors may utilize a broad range of competitive strategies. For
example, some of our competitors have offered bundled products and services in order to reduce the initial cost of their storage products. Our competitors may also choose to adopt more aggressive pricing policies than we choose to adopt. Some of our
competitors have offered their products either at significant discounts or even for free in response to our efforts to market the overall benefits and technological merits of our products.

Many competitors have developed competing all-flash or hybrid storage technologies. For example, some of our competitors have developed
all-flash storage products with data reduction technologies that directly compete with our products. We expect our competitors to continue to improve the performance of their products, reduce their prices and introduce new services and technologies
that may, or that they may claim to, offer greater performance and improved total cost of ownership as compared to our products. In addition, our competitors may develop enhancements to, or future generations of, competitive products that may render
our products or technologies obsolete or less competitive. These and other competitive pressures may prevent us from competing successfully against current or future competitors.

Many of our established competitors have long-standing relationships with key decision makers at many of our current and prospective customers, which
may inhibit our ability to compete effectively and maintain or increase our market share.

Many of our competitors benefit from
established brand awareness and long-standing relationships with key decision makers at many of our current and prospective customers. We expect that our competitors will seek to leverage these existing relationships to discourage customers from
purchasing our products. In particular, when competing against us, we expect our competitors to emphasize the perceived risks of relying on products from a company with a shorter operating history. Additionally, most of our prospective customers
have existing storage systems manufactured by our competitors. This gives an incumbent competitor an advantage in retaining the customer because the incumbent competitor already understands the customers network infrastructure, user demands
and IT needs. In the event that we are unable to successfully sell our products to new customers or persuade our customers from continuing to purchase our products, we may not be able to maintain or increase our market share and revenue, which could
adversely affect our business and operating results.

Our ability to increase our revenue will substantially depend on our ability to attract,
motivate and retain sales, engineering and other key personnel, including our management team, and any failure to attract, motivate and retain these employees could harm our business, operating results and financial condition.

Our ability to increase our revenue will substantially depend on our ability to attract and retain qualified sales, engineering and other key
employees, including our management. These positions may require candidates with specific backgrounds in software and the storage industry, and competition for employees with such expertise is intense. Our ability to attract, motivate or retain
employees may be reduced as we become a public company, as the value of our stock fluctuates and as our employees have the opportunity to sell their equity after this offering. We may not be successful in attracting, motivating and retaining
qualified personnel. We have from time to time experienced, and we expect to continue to experience, difficulty in hiring and retaining highly skilled employees with appropriate qualifications. To the extent that we are successful in hiring to fill
these positions, we need a significant amount of time to train the new employees before they can become effective and efficient in performing their jobs. From time to time, there may be changes in our management team resulting from the hiring or
departure of those individuals. Members of our management team, including our executive officers, are generally employed on an at-will basis, which means that they could terminate their employment with us at any time. If we are unable to attract,
motivate and retain qualified sales, engineering and other key employees, including our management, our business and operating results could suffer.

If we fail to adequately expand our sales force our growth will be impeded.

We will need to continue to expand and optimize our sales infrastructure in order to grow our customer base and our business. We plan to
continue to expand our sales force, both domestically and internationally. Identifying, recruiting and training qualified sales personnel require significant time, expense and attention. It can take time before our sales representatives are fully
trained and productive. Our business may be adversely affected if our efforts to expand and train our sales force do not generate a corresponding increase in revenue. In particular, if we are unable to hire, develop and retain qualified sales
personnel or if new sales personnel are unable to achieve desired productivity levels in a reasonable period of time, we may not be able to realize the expected benefits of this investment or increase our revenue.

If we fail to develop and introduce new or enhanced products on a timely basis, our ability to attract and retain customers could be impaired and our
competitive position could be harmed.

We operate in a dynamic environment characterized by rapidly changing technologies
and industry standards and technological obsolescence. To compete successfully, we must design, develop, market and sell new or enhanced products that provide increasingly higher levels of performance, capacity and reliability and that meet the cost
expectations of our customers, which is a complex and uncertain process. The introduction of new products by our competitors, the market acceptance of products based on new or alternative technologies or the emergence of new industry standards could
render our existing or future products obsolete or less competitive. As we introduce new or enhanced products, we must successfully manage product launches and transitions to the next generations of our products. For example, in June 2015, we
announced our new FlashArray//m product. If we are not able to successfully manage the transition from our FlashArray 400-Series product to our FlashArray//m product, our business, operating results and financial condition could
be harmed. Similarly, if we fail to introduce new or enhanced products that meet the needs of our customers in a timely or cost-effective fashion, we will lose market share and our operating results will be adversely affected.

Our research and development efforts may not produce successful products that result in significant revenue in the near future, if at all.

Developing new products and related enhancements is expensive and time intensive. Our investments in research and development may result in
products that may not achieve market adoption, are more expensive to develop than anticipated, may take longer to generate revenue or may generate less revenue than we anticipate. Our future plans include significant investments in research and
development for new products and related opportunities. We believe that we must continue to dedicate significant resources to our research and development efforts to maintain or expand our competitive position. However, these efforts may not result
in significant revenue in the near future, if at all, which could adversely affect our business and operating results.

If we fail to successfully
maintain or grow our relationships with channel partners, our business, operating results and financial condition could be harmed.

Our future success is highly dependent upon our ability to establish and maintain successful relationships with a variety of channel partners
in markets where we do not have a large direct sales force or direct customer support personnel. In addition to selling our products, our partners may offer installation, post-sale service and support on our behalf in their local markets. In markets
where we rely on partners more heavily, we have less contact with our customers and less control over the sales process and the quality and responsiveness of our partners. As a result, it may be more difficult for us to ensure the proper delivery
and installation of our products or the quality or responsiveness of the support and services being offered. Any failure on our part to effectively identify, train and manage our channel partners and to monitor their sales activity, as well as the
customer support and services being provided to our customers in their local markets, could harm our business, operating results and financial condition.

Our channel partners may choose to discontinue offering our products and services or may not
devote sufficient attention and resources toward selling our products and services. We typically enter into non-exclusive, written agreements with our channel partners. These agreements generally have a one-year, self-renewing term, have no minimum
sales commitment and do not prohibit our channel partners from offering products and services that compete with ours. Accordingly, our channel partners may choose to discontinue offering our products and services or may not devote sufficient
attention and resources toward selling our products and services. Additionally, our competitors may provide incentives to our existing and potential channel partners to use, purchase or offer their products and services or to prevent or reduce sales
of our products and services. The occurrence of any of these events could harm our business, operating results and financial condition.

Our gross
margins are impacted by a variety of factors, are subject to variation from period to period and are difficult to predict.

Our
gross margins fluctuate from period to period due primarily to product costs, customer mix and product mix. Over the fiscal year ended January 31, 2015, and the six months ended July 31, 2015, our quarterly gross margins ranged from 53% to 60%.
Our gross margins are likely to continue to fluctuate and may be affected by a variety of factors, including:

changes in customer, geographic or product mix, including mix of configurations within products;

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the cost of components and freight;

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new product introductions and enhancements, potentially with initial sales at relatively small volumes and higher product costs;

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the timing and amount of revenue recognized and deferred;

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excess inventory levels or purchase commitments as a result of changes in demand forecasts or product transitions;

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an increase in product returns, order rescheduling and cancellations;

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the timing of technical support service contracts and contract renewals;

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inventory stocking requirements to mitigate supply constraints, accommodate unforeseen demand or support new product introductions; and

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product quality and serviceability issues.

Due to such factors, gross margins are subject to
variation from period to period and are difficult to predict. If we are unable to manage these factors effectively, our gross margins may decline, and fluctuations in gross margins may make it difficult to manage our business and achieve or maintain
profitability, which could materially harm our business, operating results and financial condition.

Our operating results may fluctuate
significantly, which could make our future results difficult to predict and could cause our operating results to fall below expectations.

Our operating results may fluctuate due to a variety of factors, many of which are outside of our control. As a result, comparing our operating
results on a period-to-period basis may not be meaningful. You should not rely on our past results as an indication of our future performance. If our revenue or operating results fall below the expectations of investors or any securities analysts
that follow our company, the price of our Class A common stock would likely decline.

our ability to develop, introduce and ship in a timely manner new products and product enhancements that meet customer requirements;



our ability to effectively manage product transitions as we introduce new products;

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any change in the competitive dynamics of our markets, including new entrants or discounting of product prices;

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our ability to control costs, including our operating expenses; and

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future accounting pronouncements and changes in accounting policies.

The occurrence of any
one of these risks could negatively affect our operating results in any particular quarter, which could cause the price of our Class A common stock to decline.

Our sales cycles can be long and unpredictable, particularly with respect to large orders, and our sales efforts require considerable time and expense.
As a result, it can be difficult for us to predict when, if ever, a particular customer will choose to purchase our products, which may cause our operating results to fluctuate.

Our sales efforts involve educating our customers about the use and benefits of our products, including their technical capabilities and cost
saving potential. Larger customers often undertake an evaluation and testing process that can result in a lengthy sales cycle. We spend substantial time and resources on our sales efforts without any assurance that our efforts will produce any
sales. In addition, product purchases are frequently subject to budget constraints, multiple approvals and unplanned administrative, processing and other delays. A substantial portion of our quarterly sales typically occurs during the last several
weeks of the quarter, which we believe largely reflects customer buying patterns of products similar to ours and other products in the technology industry generally. Since we do not recognize revenue from a sale until title is transferred for the
product, if we have a substantial portion of our sales at the end of a quarter, we may be unable to transfer title and recognize the associated revenue in that quarter. Furthermore, our products come with a 30-day money back guarantee, allowing a
customer to return a FlashArray product within 30 days of receipt if the customer is not satisfied with its purchase for any reason. In addition, a portion of our sales in any quarter is generated by sales activity initiated during the
quarter. These factors, among others, make it difficult for us to predict when customers may purchase our products. We may expend significant resources on an opportunity without ever achieving a sale, which may adversely affect our operating results
and cause our operating results to fluctuate. In addition, if sales expected from a specific customer for a particular quarter are not realized in that quarter or at all, our operating results may suffer.

Our company culture has contributed to our success, and if we cannot maintain this culture as we grow, we
could lose the innovation, creativity and teamwork fostered by our culture, and our business may be harmed.

We believe that a
critical contributor to our success has been our company culture, which we believe fosters innovation, creativity, teamwork, passion for customers and focus on execution, as well as facilitating critical knowledge transfer and knowledge sharing. As
we grow and change, we may find it difficult to maintain these important aspects of our company culture, which could limit our ability to innovate and operate effectively. Any failure to preserve our culture could also negatively affect our ability
to retain and recruit personnel, continue to perform at current levels or execute on our business strategy.

Because our long-term success
depends, in part, on our ability to expand the sales of our products to customers located outside of the United States, our business is susceptible to risks associated with international operations.

We maintain operations outside of the United States. We have been expanding and intend to continue to expand these operations in the future. We
have limited experience operating in foreign jurisdictions. Our inexperience in operating our business outside of the United States increases the risk that our international expansion efforts may not be successful. In addition, conducting and
expanding international operations subjects us to new risks that we have not generally faced in the United States. These include:

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exposure to foreign currency exchange rate risk;

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difficulties in collecting payments internationally, and managing and staffing international operations;

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establishing relationships with channel partners in international locations;

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the increased travel, infrastructure and legal compliance costs associated with international locations;

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the burdens of complying with a wide variety of laws associated with international operations, including taxes and customs;

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significant fines, penalties and collateral consequences if we fail to comply with anti-bribery laws;

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heightened risk of improper, unfair or corrupt business practices in certain geographies;

political, social and economic instability abroad, terrorist attacks and security concerns in general; and

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reduced or varied protection for intellectual property rights in some countries.

The
occurrence of any one of these risks could negatively affect our international operations and, consequently, our business, operating results and financial condition generally.

The sales prices of our products and services may decrease, which may reduce our gross profits and adversely impact our financial results.

The sales prices for our products and services may decline for a variety of reasons, including competitive pricing pressures, discounts, a
change in our mix of products and services, the introduction of competing products or services or promotional programs. Competition continues to increase in the markets in which we participate, and we expect competition to further increase in the
future, thereby leading to increased pricing pressures. Larger competitors with more diverse product and service offerings may reduce the price of products or services that compete with ours or may bundle them with other products and services.
Additionally, although we price our products and services predominantly in U.S. dollars, currency fluctuations in certain countries and regions may negatively impact actual prices that partners and customers are willing to pay in those countries and
regions. Furthermore, we anticipate that the sales prices for our products will decrease over product life cycles.

We cannot assure you that we will be successful in developing and introducing new offerings with enhanced functionality on a timely basis, or that our new product and services offerings, if
introduced, will enable us to maintain or improve our gross margins and achieve profitability.

We derive substantially all of our revenue from a
single family of products, and a decline in demand for these products would cause our revenue to grow more slowly or to decline.

Our FlashArray family of products accounts for all of our revenue and will continue to comprise a significant portion of our revenue for
the foreseeable future. As a result, our revenue could be reduced by:

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the failure of our current products to achieve broad market acceptance;

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any decline or fluctuation in demand for our products, whether as a result of product obsolescence, technological change, customer budgetary constraints or other factors;

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the introduction of competing products and technologies that replace or substitute, or represent an improvement over, our products; and

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our inability to release enhanced versions of our products, including any related software, on a timely basis.

If the market for all-flash storage products grows more slowly than anticipated or if demand for our products declines, we may not be able to
increase our revenue or achieve and maintain profitability.

Our products are highly technical and may contain undetected defects, which could cause
data unavailability, loss or corruption that might, in turn, result in liability to our customers and harm to our reputation and business.

Our products are highly technical and complex and are often used to store information critical to our customers business operations. Our
products may contain undetected errors, defects or security vulnerabilities that could result in data unavailability, loss, corruption or other harm to our customers. Some errors in our products may only be discovered after they have been installed
and used by customers. Any errors, defects or security vulnerabilities discovered in our products after commercial release could result in a loss of revenue or delay in revenue recognition, injury to our reputation, a loss of customers or increased
service and warranty costs, any of which could adversely affect our business and operating results. In addition, errors or failures in the products of third-party technology vendors may be attributed to us and may harm our reputation.

We could face claims for product liability, tort or breach of warranty. Many of our contracts with customers contain provisions relating to
warranty disclaimers and liability limitations, which may be difficult to enforce. Defending a lawsuit, regardless of its merit, would be costly and might divert managements attention and adversely affect the markets perception of us and
our products. Our business liability insurance coverage could prove inadequate with respect to a claim and future coverage may be unavailable on acceptable terms or at all. These product-related issues could result in claims against us, and our
business, operating results and financial condition could be harmed.

Our brand name and our business may be harmed by the marketing strategies of
our competitors.

Because of the early stage of our business, we believe that building and maintaining brand recognition and
customer goodwill is critical to our success. Our efforts in this area have, on occasion, been hampered by the marketing efforts of our competitors, which have included statements about us and our products. If we are unable to effectively respond to
the marketing efforts of our competitors and protect our brand and customer goodwill now or in the future, our business will be adversely affected.

Our products must interoperate with third party operating systems, software applications and hardware, and
if we are unable to devote the necessary resources to ensure that our products interoperate with such software and hardware, we may lose or fail to increase our market share and may experience reduced demand for our products.

Our products must interoperate with our customers existing infrastructure, specifically their networks, servers, software and operating
systems, which may be manufactured by a wide variety of vendors. When new or updated versions of these software operating systems or applications are introduced, we must sometimes develop updated versions of our software so that our products will
interoperate properly. For example, our Pure1 cloud-based management and support includes connectors to virtualization platforms, allowing our customers to manage the FlashArray from within the native management tools, including for
VMware and OpenStack. We may not deliver or maintain interoperability quickly, cost-effectively or at all. These efforts require capital investment and engineering resources. If we fail to maintain compatibility of our products with these
infrastructure components, our customers may not be able to fully utilize our products, and we may, among other consequences, lose or fail to increase our market share and experience reduced demand for our products, which may harm our business,
operating results and financial condition.

Our products must conform to industry standards in order to be accepted by customers in our markets.

Generally, our products comprise only a part of a datacenter. The servers, network, software and other components and systems of a
datacenter must comply with established industry standards in order to interoperate and function efficiently together. We depend on companies that provide other systems in a datacenter to conform to prevailing industry standards. Often, these
companies are significantly larger and more influential in driving industry standards than we are. Some industry standards may not be widely adopted or implemented uniformly, and competing standards may emerge that may be preferred by our customers.
If larger companies do not conform to the same industry standards that we do, or if competing standards emerge, market acceptance of our products could be adversely affected, which may harm our business.

Our ability to successfully market and sell our products is dependent in part on ease of use and the quality of our support offerings, and any failure
to offer high-quality installation and technical support could harm our business.

Once our products are deployed within our
customers datacenters, customers depend on our support organization to resolve technical issues relating to our products. Our ability to provide effective support is largely dependent on our ability to attract, train and retain qualified
personnel, as well as to engage with qualified support partners that provide a similar level of customer support. In addition, our sales process is highly dependent on our product and business reputation and on recommendations from our existing
customers. Although our products are designed to be interoperable with existing servers and systems, we may need to provide customized installation and configuration support to our customers before our products become fully operational in their
environments. Any failure to maintain, or a market perception that we do not maintain, high-quality installation and technical support could harm our reputation, our ability to sell our products to existing and prospective customers and our
business.

We rely on contract manufacturers to manufacture our products, and if we fail to manage our relationship with our contract manufacturers
successfully, our business could be negatively impacted.

We rely on a limited number of contract manufacturers to manufacture our
products. Our reliance on contract manufacturers reduces our control over the assembly process, and exposes us to risks, such as reduced control over quality assurance, costs and product supply. If we fail to manage our relationships with these
contract manufacturers effectively, or if these contract manufacturers experience delays, disruptions, capacity constraints or quality control problems, our ability to timely ship products to our customers could be impaired and our competitive
position and reputation could be harmed. If we are required to change contract manufacturers or assume internal manufacturing operations, we may lose revenue, incur increased costs and damage our customer relationships. Qualifying a new contract
manufacturer and commencing production is

expensive and time-consuming. We may need to increase our component purchases, contract manufacturing capacity and internal test and quality functions if we experience increased demand. The
inability of our contract manufacturers to provide us with adequate supplies of high-quality products could cause a delay in our order fulfillment, and our business, operating results and financial condition may be harmed.

We rely on a limited number of suppliers, and in some cases single-source suppliers, and any disruption or termination of these supply
arrangements could delay shipments of our products and could harm our relationships with current and prospective customers.

We
rely on a limited number of suppliers, and in some cases, on single-source suppliers, for several key components of our products, and we have not generally entered into agreements for the long-term purchase of these components. For example, the CPUs
utilized in our products are supplied by Intel Corporation, or Intel, and neither we nor our contract manufacturers have an agreement with Intel for the procurement of these CPUs. Instead, we purchase the CPUs either directly from Intel or through a
reseller on a purchase order basis. Intel or its resellers could stop selling to us at any time or could raise their prices without notice. This reliance on a limited number of suppliers and the lack of any guaranteed sources of supply exposes us to
several risks, including:

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the inability to obtain an adequate supply of key components, including solid-state drives;

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price volatility for the components of our products;

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failure of a supplier to meet our quality or production requirements;

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failure of a supplier of key components to remain in business or adjust to market conditions; and

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consolidation among suppliers, resulting in some suppliers exiting the industry or discontinuing the manufacture of components.

As a result of these risks, we cannot assure you that we will be able to obtain enough of these key components in the future or that the cost
of these components will not increase. If our supply of components is disrupted or delayed, or if we need to replace our existing suppliers, there can be no assurance that additional components will be available when required or that components will
be available on terms that are favorable to us, which could extend our lead times, increase the costs of our components and harm our business, operating results and financial condition. Even if we are successful in growing our business, we may not
be able to continue to procure components at reasonable prices, which may require us to enter into longer-term contracts with component suppliers to obtain these components at competitive prices. This could increase our costs and decrease our gross
margins, harming our business, operating results and financial condition.

Managing the supply of our products and their components is complex.
Insufficient supply and inventory may result in lost sales opportunities or delayed revenue, while excess inventory may harm our gross margins.

Our third-party manufacturers procure components and build our products based on our forecasts, and we generally do not hold inventory for a
prolonged period of time. These forecasts are based on estimates of future demand for our products, which are in turn based on historical trends and analyses from our sales and marketing organizations, adjusted for overall market conditions. In
order to reduce manufacturing lead times and plan for adequate component supply, from time to time we may issue forecasts for components and products that are non-cancelable and non-returnable. Our inventory management systems and related supply
chain visibility tools may be inadequate to enable us to make accurate forecasts and effectively manage the supply of our products and components. We have, in the past, had to write off inventory in connection with transitions to new product models.
If we ultimately determine that we have excess supply, we may have to reduce our prices and write down or write off excess or obsolete inventory, which in turn could result in lower gross margins. Alternatively, insufficient supply levels may lead
to shortages that result in delayed revenue or loss of sales opportunities altogether as potential customers turn to competitors products that may be more readily available. If we are unable to effectively manage our supply and inventory, our
results of operations could be adversely affected.

If we are unable to sell renewals of our maintenance and support services to our customers, our future
revenue and operating results will be harmed.

Existing customers may not renew their maintenance and support agreements after the
initial period, and given our limited operating history, we may not be able to accurately predict our renewal rates. Our customers renewal rates may decline or fluctuate as a result of a number of factors, including their available budget and
the level of their satisfaction with our storage platform, customer support and pricing as compared to that offered by our competitors. If our customers renew their contracts, they may renew on terms that are less economically beneficial to us. We
cannot assure you that our customers will renew their maintenance and support agreements, and if our customers do not renew their agreements or renew on less favorable terms, our revenue may grow more slowly than expected, if at all.

We expect that revenue from maintenance and support agreements will increase as a percentage of total revenue over time, and because we recognize this
revenue over the term of the relevant contract period, downturns or upturns in sales are not immediately reflected in full in our results of operations.

We expect that revenue from maintenance and support agreements will increase as a percentage of total revenue over time. We recognize
maintenance and support revenue ratably over the term of the relevant service period. As a result, much of the maintenance and support revenue we report each quarter is derived from maintenance and support agreements that we sold in prior quarters.
Consequently, a decline in new or renewed maintenance and support agreements in any one quarter will not be fully reflected in revenue in that quarter but will negatively affect our revenue in future quarters. Accordingly, the effect of significant
downturns in sales of maintenance and support is not reflected in full in our results of operations until future periods. Also, it is difficult for us to rapidly increase our maintenance and support revenue through additional sales in any period, as
revenue from renewals must be recognized ratably over the applicable service period.

Our operations and performance depend in part on worldwide economic conditions
and the impact these conditions have on levels of spending on datacenter technology. Our business depends on the overall demand for datacenter infrastructure and on the economic health of our current and prospective customers. Weak economic
conditions, or a reduction in datacenter spending, would likely adversely impact our business, operating results and financial condition in a number of ways, including by reducing sales, lengthening sales cycles and lowering prices for our products
and services.

Third-party claims that we are infringing the intellectual property rights of others, whether successful or not, could subject
us to costly and time-consuming litigation or require us to obtain expensive licenses, and our business could be harmed.

There is a substantial amount of intellectual property litigation in the flash-based storage industry, and we may become party to, or
threatened with, litigation or other adversarial proceedings regarding intellectual property rights with respect to our technology, including interference or derivation proceedings before the U.S. Patent and Trademark Office. Third parties may
assert infringement claims against us based on existing or future intellectual property rights. The outcome of intellectual property litigation is subject to uncertainties that cannot be adequately quantified in advance. We have in the past received
and may in the future receive inquiries from other intellectual property holders and may become subject to claims that we infringe their intellectual property rights, particularly as we expand our presence in the market and face increasing
competition.

For example, in November 2013, EMC Corporation, or EMC, filed a complaint against us in the United States District Court for
the District of Massachusetts, alleging that our hiring of EMC employees evidences a scheme to misappropriate EMCs confidential information and trade secrets and to unlawfully interfere with EMCs business relationships with its
customers and contractual relationships with its employees. In addition, in

November 2013, EMC filed a complaint against us in the United States District Court for the District of Delaware, alleging infringement of five patents held by EMC. While we intend to vigorously
defend ourselves in these lawsuits, we are unable to predict the ultimate outcome of this litigation. See the section titled BusinessLegal Proceedings for more information relating to this litigation.

Any intellectual property rights claim, including the lawsuits brought by EMC, against us or our customers, suppliers, and channel partners,
with or without merit, could be time-consuming and expensive to litigate or settle, could divert managements resources and attention from operating our business and could force us to acquire intellectual property rights and licenses, which may
involve substantial royalty payments. Further, a party making such a claim, if successful, could secure a judgment that requires us to pay substantial damages, including treble damages and attorneys fees if we are found to have willfully
infringed a patent. An adverse determination also could invalidate our intellectual property rights and prevent us from manufacturing and offering our products to our customers and may require that we procure or develop substitute products that do
not infringe, which could require significant effort and expense. We may not be able to re-engineer our products successfully to avoid infringement, and we may have to seek a license for the infringed technology, which may not be available on
reasonable terms or at all, may significantly increase our operating expenses or may require us to restrict our business activities in one or more respects. Even if we were able to obtain a license, it could be non-exclusive, thereby giving our
competitors access to the same technologies licensed to us. Claims that we have misappropriated the confidential information or trade secrets of third parties could have a similar negative impact on our business. Any of these events could harm our
business and financial condition.

We currently have a number of agreements in effect pursuant to which we have agreed to defend,
indemnify and hold harmless our customers, suppliers and channel partners from damages and costs which may arise from the infringement by our products of third-party patents, trademarks or other proprietary rights. The scope of these indemnity
obligations varies, but may, in some instances, include indemnification for damages and expenses, including attorneys fees. Our insurance may not cover intellectual property infringement claims. A claim that our products infringe a third
partys intellectual property rights could harm our relationships with our customers, deter future customers from purchasing our products and expose us to costly litigation and settlement expenses. Even if we are not a party to any litigation
between a customer and a third party relating to infringement by our products, an adverse outcome in any such litigation could make it more difficult for us to defend our products against intellectual property infringement claims in any subsequent
litigation in which we are a named party. Any of these results could harm our brand and financial condition.

The success of our business depends in
part on our ability to protect and enforce our intellectual property rights.

We rely on a combination of patent, copyright,
service mark, trademark and trade secret laws, as well as confidentiality procedures and contractual restrictions, to establish and protect our proprietary rights, all of which provide only limited protection. As of July 31, 2015, we had over 200
issued patents and over 150 patent applications in the United States and foreign countries. We cannot assure you that any patents will issue with respect to our currently pending patent applications in a manner that gives us the protection that
we seek, if at all, or that any patents issued to us will not be challenged, invalidated, circumvented or held to be unenforceable in actions against alleged infringers. Our issued patents and any patents that may issue in the future with respect to
pending or future patent applications may not provide sufficiently broad protection or they may not prove to be enforceable in actions against alleged infringers. Changes to the patent laws in the United States and other jurisdictions could also
diminish the value of our patents and patent applications or narrow the scope of our patent protection. We cannot be certain that the steps we have taken will prevent unauthorized use of our technology or the reverse engineering of our technology.
Moreover, others may independently develop technologies that are competitive to ours or infringe our intellectual property. Furthermore, any of our trademarks may be challenged by others or invalidated through administrative process or litigation.

Protecting against the unauthorized use of our intellectual property, products and other
proprietary rights is expensive and difficult. Litigation may be necessary in the future to enforce or defend our intellectual property rights or to determine the validity and scope of the proprietary rights of others. Any such litigation could
result in substantial costs and diversion of managements resources and attention, either of which could harm our business, operating results and financial condition. Further, many of our current and potential competitors have the ability to
dedicate substantially greater resources to defending intellectual property infringement claims and to enforcing their intellectual property rights than we have. Accordingly, we may not be able to prevent third parties from infringing upon or
misappropriating our intellectual property. Effective patent, trademark, service mark, copyright and trade secret protection may not be available in every country in which our products are available. An inability to adequately protect and enforce
our intellectual property and other proprietary rights could harm our business and financial condition.

If we are unable to protect the
confidentiality of our trade secrets, the value of our technology could be materially adversely affected and our business could be harmed.

In addition to the protection afforded by patents, we rely on confidential proprietary information, including trade secrets and know-how to
develop and maintain our competitive position. Any disclosure to or misappropriation by third parties of our confidential proprietary information could enable competitors to quickly duplicate or surpass our technological achievements, thus eroding
our competitive position in our market. We seek to protect our confidential proprietary information, in part, by confidentiality agreements and invention assignment agreements with our employees, consultants, scientific advisors, contractors and
collaborators. These agreements are designed to protect our proprietary information; however, we cannot be certain that such agreements have been entered into with all relevant parties, and we cannot be certain that our trade secrets and other
confidential proprietary information will not be disclosed or that competitors will not otherwise gain access to our trade secrets or independently develop substantially equivalent information and techniques. For example, any of these parties may
breach the agreements and disclose our proprietary information, including our trade secrets, and we may not be able to obtain adequate remedies for such breaches. We also seek to preserve the integrity and confidentiality of our confidential
proprietary information by maintaining physical security of our premises and physical and electronic security of our IT systems, but it is possible that these security measures could be breached. If any of our confidential proprietary information
were to be lawfully obtained or independently developed by a competitor, we would have no right to prevent such competitor from using that technology or information to compete with us, which could harm our competitive position. Further, the laws of
some foreign countries do not protect proprietary rights to the same extent or in the same manner as the laws of the United States. As a result, we may encounter significant problems in protecting and defending our intellectual property both in the
United States and abroad. If we are unable to prevent material disclosure of the intellectual property related to our technologies to third parties, we will not be able to establish or maintain a competitive advantage in our market, which could harm
our business.

Our use of open source software could impose limitations on our ability to commercialize our products.

We use open source software in our products and expect to continue to use open source software in the future. Although we monitor our use of
open source software, the terms of many open source licenses have not been interpreted by U.S. or foreign courts, and there is a risk that such licenses could be construed in a manner that imposes unanticipated conditions or restrictions on our
ability to market our products. From time to time, we may face claims from third parties claiming ownership of, or demanding release of, the open source software or derivative works that we have developed using such software, which could include our
proprietary source code, or otherwise seeking to enforce the terms of the applicable open source license. These claims could result in litigation and could require us to make our software source code freely available, seek licenses from third
parties in order to continue offering our products for certain uses or cease offering the implicated solutions unless and until we can re-engineer them to avoid infringement. This re-engineering process could require significant additional research
and development resources, and we may be required to discontinue providing some of our software in the event re-engineering cannot be accomplished on a timely basis, any of which could harm our business, operating results and financial condition.

In the ordinary course of business, we store sensitive data on our
internal systems, networks and servers, which may include intellectual property, our proprietary business information and that of our customers, suppliers and business partners and sales data, which may include personally identifiable information.
Additionally, we design and sell products that allow our customers to store our customers data. The security of our own networks and the intrusion protection features of our product are both critical to our operations and business strategy.

We devote significant resources to network security, data encryption and other security measures to protect our systems and data, but
these security measures cannot provide absolute security. For example, we use encryption and authentication technologies to secure the transmission and storage of data and prevent third party access to data or accounts, but these security measures
are subject to third-party security breaches, employee error, malfeasance, faulty password management or other irregularities. Any destructive or intrusive breach of our internal systems could result in the information stored on our networks being
accessed, publicly disclosed, lost or stolen. Additionally, an effective attack on our products could disrupt the proper functioning of our products, allow unauthorized access to sensitive, proprietary or confidential information of ours or our
customers, disrupt or temporarily interrupt customers operations or cause other destructive outcomes, including the theft of information sufficient to engage in fraudulent transactions. The risk that these types of events could seriously harm
our business is likely to increase as we expand our network of channel partners, resellers and authorized service providers and operate in more countries. The economic costs to us to eliminate or alleviate cyber or other security problems, viruses,
worms, malicious software systems and security vulnerabilities could be significant and may be difficult to anticipate or measure because the damage may differ based on the identity and motive of the programmer or hacker, which are often difficult
to identify. If any of these types of security breaches, actual or perceived, were to occur and we were to be unable to protect sensitive data, our relationships with our business partners and customers could be materially damaged, our reputation
and brand could be materially harmed, use of our products could decrease and we could be exposed to a risk of loss or litigation and possible liability.

We may further expand through acquisitions of, or investments in, other companies, each of which may divert our managements attention, resulting
in additional dilution to our stockholders and consumption of resources that are necessary to sustain and grow our business.

Our
business strategy may, from time to time, include acquiring complementary products, technologies or businesses. We also may enter into relationships with other businesses in order to expand our product offerings, which could involve preferred or
exclusive licenses, additional channels of distribution or discount pricing or investments in other companies. Negotiating these transactions can be time-consuming, difficult and expensive, and our ability to close these transactions may be subject
to third-party or government approvals, which are beyond our control. Consequently, we can make no assurance that these transactions, once undertaken and announced, will close.

These kinds of acquisitions or investments may result in unforeseen operating difficulties and expenditures. In particular, we may encounter
difficulties assimilating or integrating the businesses, technologies, products, personnel or operations of the acquired companies, particularly if the key personnel of the acquired business choose not to work for us, and we may have difficulty
retaining the customers of any acquired business. Acquisitions may also disrupt our ongoing business, divert our resources and require significant management attention that would otherwise be available for development of our business. Any
acquisition or investment could expose us to unknown liabilities. Moreover, we cannot assure you that the anticipated benefits of any acquisition or investment would be realized or that we would not be exposed to unknown liabilities. In connection
with these types of transactions, we may issue additional equity securities that would dilute our stockholders, use cash that we may need in the future to operate our business, incur debt on terms unfavorable to us or that we are unable to

repay, incur large charges or substantial liabilities, encounter difficulties integrating diverse business cultures and become subject to adverse tax consequences, substantial depreciation or
deferred compensation charges. These challenges related to acquisitions or investments could harm our business and financial condition.

We are an
emerging growth company, and any decision on our part to comply only with certain reduced reporting and disclosure requirements applicable to emerging growth companies could make our Class A common stock less attractive to investors.

We are an emerging growth company, and, for as long as we continue to be an emerging growth company, we may choose to take
advantage of exemptions from various reporting requirements applicable to other public companies but not to emerging growth companies, including: not being required to have our independent registered public accounting firm audit our
internal control over financial reporting under Section 404 of the Sarbanes-Oxley Act, reduced disclosure obligations regarding executive compensation in our periodic reports and proxy statements, and exemptions from the requirements of holding
a nonbinding advisory vote on executive compensation and stockholder approval of any golden parachute payments not previously approved. We could be an emerging growth company for up to five years following the completion of this offering. We will
remain an emerging growth company until the earliest to occur of (i) the last day of the fiscal year in which we have more than $1.0 billion in annual revenue, (ii) the date we qualify as a large accelerated filer, with at
least $700 million of equity securities held by non-affiliates, (iii) the date on which we have issued, in any three-year period, more than $1.0 billion in non-convertible debt securities, and (iv) the last day of the fiscal year ending
after the fifth anniversary of the completion of this offering. We cannot predict if investors will find our Class A common stock less attractive if we choose to rely on these exemptions. If some investors find our Class A common stock
less attractive as a result of any choices we make to avail ourselves of these exemptions, there may be a less active trading market for our Class A common stock and the market price of our Class A common stock may be more volatile.

Under the JOBS Act, emerging growth companies can also delay adopting new or revised accounting standards until such time as those standards
apply to private companies. We have irrevocably elected not to avail ourselves of this accommodation allowing for delayed adoption of new or revised accounting standards, and, therefore, we will be subject to the same new or revised accounting
standards as other public companies that are not emerging growth companies.

We may require additional capital to support business growth, and this
capital might not be available on acceptable terms, or at all.

We intend to continue to make investments to support our business
growth and may require additional funds to respond to business challenges, including the need to develop new products or enhance our existing products, enhance our operating infrastructure and acquire complementary businesses and technologies.
Accordingly, we may need to engage in equity or debt financings to secure additional funds. If we raise additional funds through further issuances of equity or convertible debt securities, our stockholders could suffer significant dilution, and any
new equity securities we issue could have rights, preferences and privileges superior to those of holders of our common stock. Any debt financing in the future could involve additional restrictive covenants relating to our capital raising activities
and other financial and operational matters, which may make it more difficult for us to obtain additional capital and to pursue business opportunities, including potential acquisitions. We may not be able to obtain additional financing on terms
favorable to us, if at all. If we are unable to obtain adequate financing or financing on terms satisfactory to us, when we require it, our ability to support our business growth and to respond to business challenges could be significantly limited
and our prospects and financial condition could be harmed.

We are exposed to the credit risk of some of our customers, which could harm our business, operating
results and financial condition.

Most of our sales are made on an open credit basis. As a general matter, we monitor individual
customer payment capability when we grant open credit arrangements and may limit these open credit arrangements based on perceived creditworthiness. We also maintain allowances we believe are adequate to cover exposure for doubtful accounts.
Although we have programs in place that are designed to monitor and mitigate these risks, we cannot assure you these programs will be effective in managing our credit risks, especially as we expand our business internationally. If we are unable to
adequately control these risks, our business, operating results and financial condition could be harmed.

Sales to U.S. federal, state and local
governments are subject to a number of challenges and risks that may adversely impact our business.

Sales to U.S. federal, state
and local governmental agencies may in the future account for a significant portion of our revenue. Sales to such government entities are subject to the following risks:



selling to governmental agencies can be highly competitive, expensive and time consuming, often requiring significant upfront time and expense without any assurance that such efforts will generate a sale;



government certification requirements applicable to our products may change and in doing so restrict our ability to sell into the U.S. federal government sector until we have attained the revised certification;



government demand and payment for our products and services may be impacted by public sector budgetary cycles and funding authorizations, with funding reductions or delays adversely affecting public sector demand for
our products and services;



we sell our products to governmental agencies through our channel partners, and these agencies may have statutory, contractual or other legal rights to terminate contracts with our distributors and resellers for
convenience or due to a default, and any such termination may adversely impact our future results of operations;



governments routinely investigate and audit government contractors administrative processes, and any unfavorable audit could result in the government refusing to continue buying our products, which would adversely
impact our revenue and results of operations, or institute fines or civil or criminal liability if the audit uncovers improper or illegal activities; and



governments may require certain products to be manufactured in the United States and other relatively high-cost manufacturing locations, and we may not manufacture all products in locations that meet these requirements,
affecting our ability to sell these products to governmental agencies.

We will need to maintain effective internal control over
financial reporting in accordance with Section 404 of the Sarbanes-Oxley Act, and the failure to do so could have a material adverse effect on our business and stock price.

The Sarbanes-Oxley Act requires, among other things, that we maintain effective internal control over financial reporting and disclosure
controls and procedures. We will be required to perform system and process evaluation and testing of our internal control over financial reporting to allow management to report on the effectiveness of our internal control over financial reporting,
as required by Section 404 of the Sarbanes-Oxley Act, or Section 404. When we are no longer an emerging growth company, our independent registered public accounting firm will also need to attest to the effectiveness of our internal control
over financial reporting. Over the last year, we have taken and continue to take additional steps to upgrade our finance and accounting function, including the hiring of additional finance and accounting personnel, and implement additional policies
and procedures associated with the financial statement close process. Our compliance with Section 404 may require us to continue to incur substantial expense and expend significant management efforts. If we are unable to

comply with the requirements of Section 404 in a timely manner, or if we or our independent registered public accounting firm notes or identifies deficiencies in our internal control over
financial reporting that are deemed to be material weaknesses, the market price of our Class A common stock could decline and we could be subject to sanctions or investigations by the Securities and Exchange Commission, or the SEC, or other
regulatory authorities, which would require additional financial and management resources.

Our international operations subject us to potentially
adverse tax consequences.

We generally conduct our international operations through wholly-owned subsidiaries and report our
taxable income in various jurisdictions worldwide based upon our business operations in those jurisdictions. By the end of 2015, we intend to complete the reorganization of our corporate tax structure and intercompany relationships to more closely
align our corporate organization with the expansion of our international business activities. Although we anticipate achieving a reduction in our overall effective tax rate in the future as a result of implementing the new corporate structure, our
restructuring efforts will require us to incur expenses in the near term for which we may not realize any benefits.

Our intercompany
relationships are, and after the implementation of our new corporate tax structure will continue to be, subject to complex transfer pricing regulations administered by taxing authorities in various jurisdictions. The relevant taxing authorities may
disagree with our determinations as to the income and expenses attributable to specific jurisdictions. If such a disagreement were to occur, and our position were not sustained, we could be required to pay additional taxes, interest and penalties,
which could result in tax charges, higher effective tax rates, reduced cash flows and lower overall profitability of our operations. In addition, following the implementation of our new corporate tax structure, if the intended tax treatment of the
structure is not accepted by the applicable taxing authorities, there are changes in tax law that negatively impact the structure or we do not operate our business consistent with the structure and applicable tax laws and regulations, we may fail to
achieve any tax advantages as a result of the new corporate structure, and our future operating results and financial condition may be negatively impacted.

Current U.S. tax laws, including limitations on the ability of taxpayers to claim and utilize foreign tax credits and the deferral of certain
tax deductions until earnings outside of the United States are repatriated to the United States, as well as changes to U.S. tax laws that may be enacted in the future, could impact the tax treatment of our foreign earnings. Due to expansion of our
international business activities, any changes in the U.S. taxation of such activities may increase our worldwide effective tax rate and adversely affect our financial condition and operating results.

Failure to comply with governmental laws and regulations could harm our business.

Our business is subject to regulation by various federal, state, local and foreign governmental agencies, including agencies responsible for
monitoring and enforcing employment and labor laws, workplace safety, product safety, environmental laws, consumer protection laws, anti-bribery laws, import/export controls, federal securities laws and tax laws and regulations. In certain
jurisdictions, these regulatory requirements may be more stringent than in the United States. For example, the European Union has adopted certain directives to facilitate the recycling of electrical and electronic equipment sold in the European
Union, including the Restriction on the Use of Certain Hazardous Substances in Electrical and Electronic Equipment directive and the Waste Electrical and Electronic Equipment directive. Noncompliance with applicable regulations or requirements could
subject us to investigations, sanctions, mandatory product recalls, enforcement actions, disgorgement of profits, fines, damages, civil and criminal penalties or injunctions. If any governmental sanctions are imposed, or if we do not prevail in any
possible civil or criminal litigation, our business, operating results and financial condition could be harmed. In addition, responding to any action will likely result in a significant diversion of managements attention and resources and an
increase in professional fees. Enforcement actions and sanctions could harm our business, operating results and financial condition.

The U.S. and various foreign governments have imposed controls, export license requirements and restrictions on the import or
export of some technologies, especially encryption technology. From time to time, governmental agencies have proposed additional regulation of encryption technology, such as requiring the escrow of imports or exports. If we fail to obtain required
import or export approval for our products, our international and domestic sales could be harmed and our revenue may be adversely affected. In many cases, we rely on vendors and channel partners to handle logistics associated with the import and
export of our products, so our visibility and control over these matters may be limited. In addition, failure to comply with such regulations could result in penalties, costs and restrictions on export privileges, which could harm our business,
operating results and financial condition.

Our business is subject to the risks of earthquakes and other natural catastrophic events, and to
interruption by man-made factors such as computer viruses or terrorism.

We have operations in locations, including our
headquarters in California, that are subject to earthquakes and other natural catastrophic events, such as severe weather and geological events, which could disrupt our operations or the operations of those customers and suppliers. Our customers
affected by a natural disaster could postpone or cancel orders of our products, which could negatively impact our business. Moreover, should any of our key suppliers fail to deliver components to us as a result of a natural disaster, we may be
unable to purchase these components in necessary quantities or may be forced to purchase components in the open market at significantly higher costs. We may also be forced to purchase components in advance of our normal supply chain demand to avoid
potential market shortages. We may not have adequate business interruption insurance to compensate us for losses due to a significant natural disaster or due to man-made factors. In addition, acts of terrorism or malicious computer viruses could
cause disruptions in our or our customers businesses or the economy as a whole. To the extent that these disruptions result in delays or cancellations of customer orders or the deployment of our products, our business, operating results and
financial condition could be harmed.

Risks Related to Our Common Stock

The dual class structure of our common stock has the effect of concentrating voting control with those stockholders who held our capital stock prior to
the completion of this offering, including our executive officers, employees and directors and their affiliates, which will limit your ability to influence the outcome of important transactions, including a change in control.

Our Class B common stock has ten votes per share, and our Class A common stock, which is the stock we are selling in this offering, has
one vote per share. Upon the closing of this offering, stockholders who hold shares of our Class B common stock, including our executive officers, employees and directors and their affiliates, will collectively hold approximately 98.5% of the voting
power of our outstanding capital stock. Because of the ten-to-one voting ratio between our Class B common stock and Class A common stock, after the completion of this offering, the holders of our Class B common stock will collectively continue
to control a majority of the combined voting power of our capital stock and therefore be able to control all matters submitted to our stockholders for approval so long as the shares of our Class B common stock represent at least 10% of all
outstanding shares of our Class A common stock and Class B common stock. These holders of our Class B common stock may also have interests that differ from yours and may vote in a way with which you disagree and which may be adverse to your
interests. This concentrated control may have the effect of delaying, preventing or deterring a change in control of our company, could deprive our stockholders of an opportunity to receive a premium for their capital stock as part of a sale of our
company and might ultimately affect the market price of our Class A common stock.

Future transfers by holders of our Class B
common stock will generally result in those shares converting into shares of our Class A common stock, subject to limited exceptions, such as certain transfers effected for estate planning purposes. The conversion of shares of our Class B
common stock into shares of our Class A

common stock will have the effect, over time, of increasing the relative voting power of those holders of Class B common stock who retain their shares in the long term. If, for example,
Dr. Dietzen and Messrs. Colgrove and Hatfield retain a significant portion of their holdings of our Class B common stock for an extended period of time, they could control a significant portion of the voting power of our capital stock for the
foreseeable future. As board members, Dr. Dietzen and Mr. Colgrove each owe a fiduciary duty to our stockholders and must act in good faith and in a manner they reasonably believe to be in the best interests of our stockholders. However,
as stockholders, Dr. Dietzen and Messrs. Colgrove and Hatfield are entitled to vote their shares in their own interests, which may not always be in the interests of our stockholders generally. For a description of the dual class structure, see
the section titled Description of Capital Stock.

If our existing stockholders sell, or indicate an intention to sell, substantial amounts of our Class A common
stock in the public market after the lock-up and legal restrictions on resale discussed in this prospectus lapse, the trading price of our Class A common stock could decline. Based on shares outstanding as of July 31, 2015, upon the
closing of this offering, we will have outstanding a total of 25,000,000 shares of Class A common stock and 160,056,764 shares of Class B common stock, assuming no exercise of the underwriters overallotment option and no exercise of
outstanding options, after giving effect to the conversion of all outstanding shares of our preferred stock into shares of Class B common stock upon the closing of this offering. Of these shares, only the shares of Class A common stock sold in
this offering will be freely tradable, without restriction, in the public market immediately after the offering. Each of our directors and officers and other holders of substantially all of our outstanding shares have entered into lock-up agreements
with the underwriters that restrict their ability to sell or transfer their shares. The lock-up agreements pertaining to this offering will expire 180 days from the date of this prospectus. Our underwriters, however, may, in their sole discretion,
waive the contractual lock-up prior to the expiration of the lock-up agreements. After the lock-up agreements expire, all 160,056,764 shares outstanding as July 31, 2015 will be eligible for sale in the public market, of which
109,815,640 shares are held by directors, executive officers and other affiliates and will be subject to volume limitations under Rule 144 under the Securities Act of 1933, as amended, or the Securities Act, and various vesting agreements. In
addition, 59,928,620 shares of Class B common stock are subject to outstanding options as of July 31, 2015 and options to purchase an aggregate of 9,174,999 shares of Class B common stock were granted subsequent to July 31, 2015.
These shares will become eligible for sale in the public market to the extent permitted by the provisions of various vesting agreements, the lock-up agreements and Rules 144 and 701 under the Securities Act. We intend to file a registration
statement on Form S-8 under the Securities Act covering all of the shares of Class A and Class B common stock subject to options outstanding and reserved for issuance under our stock plans. This registration statement will become effective
immediately upon filing, and shares covered by this registration statement will be eligible for sale in the public markets, subject to Rule 144 limitations applicable to affiliates and any lock-up agreements described above. If these additional
shares are sold, or if it is perceived that they will be sold, in the public market, the trading price of our Class A common stock could decline.

There has been no prior market for our Class A common stock. An active market may not develop or be sustained and investors may not be able to
resell their shares at or above the initial public offering price.

Our Class A common stock has been approved for listing on
the New York Stock Exchange, or NYSE, under the trading symbol PSTG. However, we cannot assure you that an active trading market for our Class A common stock will develop on such exchange or elsewhere or, if developed, that any
market will be sustained. We cannot predict the prices at which our Class A common stock will trade. The initial public offering price of our Class A common stock was determined by negotiations with the underwriters and may not bear any
relationship to the market price at which our Class A common stock will trade after this offering or to any other established criteria of the value of our business.

The trading price of our Class A common stock may be highly volatile, and an active, liquid, and
orderly market for our Class A common stock may not be sustained.

The trading price of our Class A common stock may be
highly volatile and could be subject to wide fluctuations in response to various factors, some of which are beyond our control. Some of the factors affecting our volatility may include:



price and volume fluctuations in the overall stock market from time to time;



significant volatility in the market price and trading volume of technology companies in general and of companies in our industry;



actual or anticipated changes in our results of operations or fluctuations in our operating results;

actual or anticipated changes in the expectations of investors or securities analysts;



actual or anticipated developments in our competitors businesses or the competitive landscape generally;



litigation involving us, our industry or both;



general economic conditions and trends;

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major catastrophic events;



sales of large blocks of our stock; or



departures of key personnel.

The stock markets in general, and market prices for the
securities of technology-based companies like ours in particular, have from time to time experienced volatility that often has been unrelated to the operating performance of the underlying companies. A certain degree of stock price volatility can be
attributed to being a newly public company. These broad market and industry fluctuations may adversely affect the market price of our Class A common stock, regardless of our operating performance. In several recent situations where the market
price of a stock has been volatile, holders of that stock have instituted securities class action litigation against the company that issued the stock. If any of our stockholders were to bring a lawsuit against us, the defense and disposition of the
lawsuit could be costly and divert the time and attention of our management and harm our business, operating results and financial condition.

Purchasers in this offering will experience immediate and substantial dilution in the tangible net book value of their investment.

The assumed initial public offering price of our Class A common stock is substantially higher than the net tangible book value per share
of our Class A common stock immediately after this offering. Therefore, if you purchase our Class A common stock in this offering, you will incur an immediate dilution of $14.06 in net tangible book value per share from the price you paid,
based on the assumed initial public offering price of $17.00 per share. In addition, new investors who purchase shares in this offering will have contributed approximately 42.9% of the total amount of equity capital raised by us through the date of
this offering, but will only own approximately 13.5% of our outstanding shares. The exercise of outstanding options will result in further dilution. For a further description of the dilution that you will experience immediately after this offering,
see the section titled Dilution.

If securities analysts do not publish research or reports about our business, or if they
downgrade our stock, the price of our stock could decline.

The trading market for our Class A common stock will likely be
influenced by research and reports that securities or industry analysts publish about us or our business. In the event securities or industry analysts cover our company and one or more of these analysts downgrade our stock or publish inaccurate or
unfavorable

research about our business, our stock price would likely decline. If one or more of these analysts ceases coverage of our company or fails to publish reports on us regularly, demand for our
stock could decrease, which could cause our stock price and trading volume to decline.

We have never paid dividends on our common stock and we do
not anticipate paying any cash dividends in the foreseeable future.

We have never declared or paid any dividends on our common
stock. We intend to retain any earnings to finance the operation and expansion of our business, and we do not anticipate paying any cash dividends in the future. As a result, you may only receive a return on your investment in our Class A common
stock if the market price of our common stock increases.

We will continue to incur increased costs as a result of being a public company.

As a public company, we expect to incur significant legal, accounting and other expenses that we did not incur as a private
company. In addition, new rules implemented by the SEC and NYSE require changes in corporate governance practices of public companies. We expect these rules and regulations to continue to increase our legal and financial compliance costs and to make
some activities more time-consuming and costly. We will continue to incur additional costs associated with our public company reporting requirements. We expect these rules and regulations to make it more difficult and more expensive for us to obtain
director and officer liability insurance, and we may be required to accept reduced policy limits and coverage or incur substantially higher costs to obtain the same or similar coverage. As a result, it may be more difficult for us to attract and
retain qualified people to serve on our board of directors or as executive officers.

We may invest or spend the proceeds of this offering in ways
with which you may not agree or in ways which may not yield a return.

Our net proceeds from the sale of shares of our Class A
common stock in this offering will be used for general corporate purposes, including working capital, operating expenses and capital expenditures. Additionally, we may use a portion of the net proceeds to acquire businesses, products, services or
technologies. However, we do not have agreements or commitments for any specific material acquisitions at this time. Our management will have considerable discretion in the application of the net proceeds, and you will not have the opportunity, as
part of your investment decision, to assess whether the proceeds are being used appropriately. Until the net proceeds are used, they may be placed in investments that do not produce significant income or that may lose value.

Provisions in our amended and restated certificate of incorporation and amended and restated bylaws and under Delaware law might discourage, delay or
prevent a change of control of our company or changes in our management and, therefore, depress the trading price of our Class A common stock.

Our amended and restated certificate of incorporation and amended and restated bylaws contain provisions that could depress the trading price
of our Class A common stock by acting to discourage, delay or prevent a change of control of our company or changes in our management that the stockholders of our company may deem advantageous. These provisions:



provide for a dual class common stock structure, so that certain stockholders will have significant influence over all matters requiring stockholder approval, including the election of directors and significant
corporate transactions, such as a merger or other sale of our company or its assets and which could discourage others from initiating any potential merger, takeover or other change of control transaction that other stockholders may view as
beneficial;



establish a classified board of directors so that not all members of our board of directors are elected at one time;



authorize the issuance of blank check preferred stock that our board of directors could issue to increase the number of outstanding shares to discourage a takeover attempt;

prohibit stockholder action by written consent, which requires all stockholder actions to be taken at a meeting of our stockholders;



prohibit stockholders from calling a special meeting of our stockholders;



provide that the board of directors is expressly authorized to make, alter or repeal our bylaws; and



establish advance notice requirements for nominations for elections to our board of directors or for proposing matters that can be acted upon by stockholders at stockholder meetings.

Additionally, we are subject to Section 203 of the Delaware General Corporation Law, which generally prohibits a Delaware corporation
from engaging in any of a broad range of business combinations with any interested stockholder for a period of three years following the date on which the stockholder became an interested stockholder and which may discourage,
delay, or prevent a change of control of our company.

Any provision of our amended and restated certificate of incorporation, bylaws or
Delaware law that has the effect of delaying or deterring a change in control could limit the opportunity for our stockholders to receive a premium for their shares of our common stock, and could also affect the price that some investors are willing
to pay for our Class A common stock.

Our amended and restated certificate of incorporation will provide that the Court of Chancery of the
State of Delaware will be the exclusive forum for substantially all disputes between us and our stockholders, which could limit our stockholders ability to obtain a favorable judicial forum for disputes with us or our directors, officers or
employees.

Our amended and restated certificate of incorporation provides that the Court of Chancery of the State of Delaware is
the exclusive forum for any derivative action or proceeding brought on our behalf; any action asserting a breach of fiduciary duty; any action asserting a claim against us arising pursuant to the Delaware General Corporation Law, our amended and
restated certificate of incorporation or our bylaws; or any action asserting a claim against us that is governed by the internal affairs doctrine. The choice of forum provision may limit a stockholders ability to bring a claim in a judicial
forum that it finds favorable for disputes with us or our directors, officers or other employees, which may discourage such lawsuits against us and our directors, officers and other employees. If a court were to find the choice of forum provision
contained in our amended and restated certificate of incorporation to be inapplicable or unenforceable in an action, we may incur additional costs associated with resolving such action in other jurisdictions, which could harm our business and
financial condition.

This prospectus contains forward-looking statements about us and our industry that involve substantial risks and uncertainties. All statements
other than statements of historical facts contained in this prospectus, including statements regarding our future results of operations and financial condition, business strategy and plans and objectives of management for future operations, are
forward-looking statements. In some cases, you can identify forward-looking statements by words such as anticipate, believe, continue, could, design, estimate,
expect, intend, may, plan, potentially, predict, project, should, will or the negative of these terms or other similar expressions.

We have based these forward-looking statements largely on our current expectations and projections about future events and financial trends
that we believe may affect our financial condition, results of operations, business strategy and financial needs. These forward-looking statements are subject to a number of known and unknown risks, uncertainties and assumptions, including risks
described in the section titled Risk Factors. These risks are not exhaustive. Other sections of this prospectus include additional factors that could harm our business and financial performance. Moreover, we operate in a very competitive
and rapidly changing environment. New risk factors emerge from time to time, and it is not possible for our management to predict all risk factors nor can we assess the impact of all factors on our business or the extent to which any factor, or
combination of factors, may cause actual results to differ from those contained in, or implied by, any forward-looking statements.

You
should not rely upon forward-looking statements as predictions of future events. We cannot assure you that the events and circumstances reflected in the forward-looking statements will be achieved or occur. Although we believe that the expectations
reflected in the forward-looking statements are reasonable, we cannot guarantee future results, levels of activity, performance or achievements. Except as required by law, we undertake no obligation to update publicly any forward-looking statements
for any reason after the date of this prospectus or to conform these statements to actual results or to changes in our expectations.

You
should read this prospectus and the documents that we reference in this prospectus and have filed as exhibits to the registration statement of which this prospectus is a part with the understanding that our actual future results, levels of activity,
performance and achievements may be materially different from what we expect. We qualify all of our forward-looking statements by these cautionary statements.

Unless otherwise indicated, information contained in this prospectus concerning our industry and the market in which we operate, including our
general expectations and market position, market opportunity and market size, is based on information from various sources including the independent industry publications set forth below, and is subject to a number of assumptions and limitations.
Although we are responsible for all of the disclosure contained in this prospectus and we believe the information from the industry publication and other third-party sources included in this prospectus is reliable, such information is inherently
imprecise. The content of the below sources, except to the extent specifically set forth in this prospectus, do not constitute a portion of this prospectus and are not incorporated herein.

The industry in which we operate is subject to a high degree of uncertainty and risk due to a variety of factors, including those described in
the section titled Risk Factors and elsewhere in this prospectus. These and other factors could cause results to differ materially from those expressed in the estimates made by the independent parties and by us.

We estimate that the net proceeds from the sale of 25,000,000 shares of Class A common stock in this offering will be approximately
$395.2 million at an assumed initial public offering price of $17.00 per share, the midpoint of the price range set forth on the cover page of this prospectus, after deducting underwriting discounts and commissions and estimated offering expenses
payable by us. If the underwriters exercise their over-allotment option in full, we estimate that the net proceeds will be approximately $455.1 million after deducting underwriting discounts and commissions and estimated offering expenses payable by
us.

Each $1.00 increase or decrease in the assumed initial public offering price of $17.00 per share would increase or decrease,
respectively, our net proceeds by $23.5 million, assuming the number of shares offered by us, as set forth on the cover page of this prospectus, remains the same and after deducting underwriting discounts and commissions and estimated offering
expenses payable by us. We may also increase or decrease the number of shares we are offering. An increase or decrease of 1,000,000 in the number of shares we are offering would increase or decrease, respectively, the net proceeds from this offering
by approximately $16.0 million, assuming the assumed initial public offering price remains the same and after deducting underwriting discounts and commissions.

The principal purposes of this offering are to increase our capitalization and financial flexibility, increase our visibility in the
marketplace and create a public market for our Class A common stock. As of the date of this prospectus, we cannot specify with certainty all of the particular uses for the net proceeds to us from this offering. However, we currently intend to
use the net proceeds from this offering primarily for general corporate purposes, including expansion of our product development and sales and marketing organizations. We may also use a portion of the net proceeds from this offering for the
acquisition of, or investment in, technologies, solutions or businesses that complement our business, although we have no commitments or agreements to enter into any such acquisitions or investments at this time. Accordingly, we will have broad
discretion over the uses of the net proceeds from this offering. Pending these uses, we intend to invest the net proceeds from this offering in short-term, investment-grade interest-bearing securities such as money market funds, certificates of
deposit, commercial paper and guaranteed obligations of the U.S. government.

DIVIDEND POLICY

We have never declared or paid cash dividends on our capital stock. We intend to retain all available funds and future earnings, if any, to
fund the development and expansion of our business and we do not anticipate paying any cash dividends in the foreseeable future. The terms of our outstanding loan and security agreement also restrict our ability to pay dividends, and we may also
enter into credit agreements or other borrowing arrangements in the future that will restrict our ability to declare or pay cash dividends on our common stock. Any future determination related to dividend policy will be made at the discretion of our
board of directors and will be dependent on a number of factors, including our earnings, capital requirements and overall financial conditions.

The following table sets forth our cash and cash equivalents and capitalization as of July 31, 2015 on:



an actual basis;



a pro forma basis, to reflect (i) the conversion of all outstanding shares of preferred stock into 122,280,679 shares of Class B common stock upon the closing of this offering and (ii) the filing
and effectiveness of our amended and restated certificate of incorporation; and



a pro forma as adjusted basis, to give further effect to the sale by us of 25,000,000 shares of Class A common stock in this offering at an assumed initial public offering price of $17.00 per share, the midpoint of
the price range set forth on the cover page of this prospectus, after deducting underwriting discounts and commissions and estimated offering expenses payable by us.

You should read this information together with our consolidated financial statements and related notes appearing elsewhere in this prospectus
and the sections titled Selected Consolidated Financial Data and Managements Discussion and Analysis of Financial Condition and Results of Operations.

Each $1.00 increase or decrease in the assumed initial public offering price of $17.00 per share, the midpoint of the price range set forth on the
cover page of this prospectus, would increase or decrease, respectively, the amount of cash and cash equivalents, additional paid-in capital, total stockholders (deficit) equity and total capitalization by $23.5 million, assuming the number of
shares offered by us, as set forth on the cover page of this prospectus, remains the same and after deducting underwriting discounts and commissions and estimated offering expenses payable by us. We may also increase or decrease the number of shares
we are offering. An increase or decrease of 1,000,000 in the number of shares we are offering would increase or decrease, respectively, the amount of cash and cash equivalents, stockholders (deficit) equity and total capitalization by
approximately $16.0 million, assuming the assumed initial public

offering price per share remains the same, and after deducting underwriting discounts and commissions. The pro forma as adjusted information is illustrative only, and we will adjust this
information based on the actual initial public offering price and other terms of this offering determined at pricing.

The
table above excludes the following shares:



59,928,620 shares of Class B common stock issuable upon the exercise of outstanding stock options as of July 31, 2015 under our 2009 Equity Incentive Plan with a weighted-average exercise price of $4.53 per
share;



15,102,581 shares of Class B common stock reserved for future issuance under our 2009 Equity Incentive Plan as of July 31, 2015, of which stock options to purchase an aggregate of 9,174,999 shares of
Class B common stock were granted subsequent to July 31, 2015, with an exercise price of $17.00 per share; all shares reserved for future issuance and not subject to an outstanding stock option will cease to be available for issuance at
the time our 2015 Equity Incentive Plan becomes effective in connection with this offering;



700,000 shares of Class B common stock that we issued in September 2015 to the Pure Good Foundation;



27,000,000 shares of Class A common stock reserved for future issuance under our 2015 Equity Incentive Plan, as well as any automatic increases in the number of shares of Class A common stock reserved for
future issuance under this plan, which will become effective upon the execution of the underwriting agreement for this offering; and



3,500,000 shares of Class A common stock reserved for future issuance under our 2015 Employee Stock Purchase Plan, as well as any automatic increases in the number of shares of Class A common stock
reserved for future issuance under this plan, which will become effective upon the execution of the underwriting agreement for this offering.

If you invest in our Class A common stock in this offering, your interest will be diluted to the extent of the difference between the
initial public offering price per share of our Class A common stock and the pro forma as adjusted net tangible book value per share of our common stock immediately after the closing of this offering.

Our pro forma net tangible book value of our common stock as of July 31, 2015 was $148.3 million, or $0.93 per share, based on the
total number of shares of our common stock outstanding as of July 31, 2015. Pro forma net tangible book value per share represents our total tangible assets less our total liabilities, divided by the number of outstanding shares of Class A
and Class B common stock, after giving effect to the conversion of all outstanding shares of preferred stock into 122,280,679 shares of Class B common stock immediately upon the closing of this offering.

After giving effect to the receipt of the net proceeds from our sale of 25,000,000 shares of Class A common stock in this offering at an
assumed initial public offering price of $17.00 per share, the midpoint of the price range set forth on the cover page of this prospectus, after deducting underwriting discounts and commissions and estimated offering expenses payable by us, our pro
forma as adjusted net tangible book value as of July 31, 2015, would have been $543.5 million, or $2.94 per share. This represents an immediate increase in pro forma as adjusted net tangible book value of $2.01 per share to our existing
stockholders and an immediate dilution of $14.06 per share to investors purchasing Class A common stock in this offering.

The
following table illustrates this dilution on a per share basis to new investors:

Assumed initial public offering price per share

$

17.00

Pro forma net tangible book value per share as of July 31, 2015

$

0.93

Increase in pro forma net tangible book value per share attributable to new investors in this offering

2.01

Pro forma as adjusted net tangible book value per share after this offering

2.94

Dilution in net tangible book value per share to new investors in this offering

$

14.06

Each $1.00 increase (decrease) in the assumed initial public offering price of $17.00 would increase
(decrease) our pro forma as adjusted net tangible book value per share after this offering by $0.13 per share and the dilution to new investors by $0.87 per share, assuming the number of shares offered by us, as set forth on the cover page of this
prospectus, remains the same and after deducting underwriting discounts and commissions and estimated offering expenses payable by us. Similarly, each increase (decrease) of 1,000,000 shares in the number of shares of Class A common stock
offered by us would increase (decrease) the pro forma as adjusted net tangible book value by $0.07 and $(0.07), respectively, per share and the dilution to new investors by $(0.07) and $0.07, respectively, per share, assuming the assumed initial
public offering price remains the same and after deducting underwriting discounts and commissions.

If the underwriters option to
purchase additional shares to cover over-allotments is exercised in full, the pro forma as adjusted net tangible book value per share after giving effect to this offering would be $3.20 per share, representing an immediate increase to existing
stockholders of $2.27 per share, and immediate dilution to new investors in this offering of $13.80 per share.

The following table
summarizes, as of July 31, 2015, on the pro forma as adjusted basis described above:



the total number of shares of Class A common stock purchased from us by our existing stockholders and by new investors purchasing shares in this offering;



the total consideration paid to us by our existing stockholders and by new investors purchasing Class A common stock in this offering, assuming
an initial public offering price of $17.00 per share, which is

the midpoint of the price range set forth on the cover page of this prospectus, before deducting underwriting discounts and commissions and estimated offering expenses payable by us in connection
with this offering; and



the average price per share paid by existing stockholders and by new investors purchasing shares in this offering.

Shares Purchased

Total Consideration

AveragePrice PerShare

Number

Percent

Amount

Percent

Existing stockholders

160,056,764

86.5

%

$

566,320,933

57.1

%

$

3.54

New investors

25,000,000

13.5

425,000,000

42.9

17.00

Total

185,056,764

100.0

%

$

991,320,933

100.0

%

The total number of shares of our common stock reflected in the discussion and tables above is based on
no shares of Class A common stock and 160,056,764 shares of Class B common stock outstanding, as of July 31, 2015, and excludes:



59,928,620 shares of Class B common stock issuable upon the exercise of outstanding stock options as of July 31, 2015 under our 2009 Equity Incentive Plan with a weighted-average exercise price of $4.53
per share;



15,102,581 shares of Class B common stock reserved for future issuance under our 2009 Equity Incentive Plan as of July 31, 2015, of which stock options to purchase an aggregate of 9,174,999 shares of
Class B common stock were granted subsequent to July 31, 2015, with an exercise price of $17.00 per share; all shares reserved for future issuance and not subject to an outstanding stock option will cease to be available for issuance
at the time our 2015 Equity Incentive Plan becomes effective in connection with this offering;



700,000 shares of Class B common stock that we issued in September 2015 to the Pure Good Foundation;



27,000,000 shares of Class A common stock reserved for future issuance under our 2015 Equity Incentive Plan, as well as any automatic increases in the number of shares of Class A common stock reserved for
future issuance under this plan, which we plan to adopt in connection with this offering and will become effective upon the signing of the underwriting agreement for this offering; and



3,500,000 shares of Class A common stock reserved for future issuance under our 2015 Employee Stock Purchase Plan, as well as any automatic increases in the number of shares of Class A common stock
reserved for future issuance under this plan, which will become effective upon the execution of the underwriting agreement for this offering.

A $1.00 increase (decrease) in the assumed initial public offering price of $17.00 per share would increase (decrease) total consideration
paid by new investors by $25.0 million and increase (decrease) the total consideration paid to us by new investors by 1.4% and (1.5%), respectively, assuming the number of shares offered by us, as set forth on the cover page of this prospectus,
remains the same and before deducting underwriting discounts and commissions and estimated offering expenses payable by us.

To the extent
that any outstanding options are exercised, new options are issued under our stock-based compensation plans or we issue additional shares of common stock in the future, there will be further dilution to investors participating in this offering. If
all outstanding options under our 2009 Equity Incentive Plan as of July 31, 2015 were exercised, then our existing stockholders, including the holders of these options, would own 89.8% and our new investors would own 10.2% of the total number
of shares of common stock outstanding upon the closing of this offering.

The selected consolidated statements of operations data for the fiscal years ended January 31, 2014 and 2015 and the consolidated balance
sheet data as of January 31, 2014 and 2015 are derived from our audited consolidated financial statements included elsewhere in this prospectus. The selected consolidated statements of operations data for the fiscal year ended January 31,
2013 and the consolidated balance sheet data as of January 31, 2013 are derived from our unaudited consolidated financial statements not included in this prospectus. The selected consolidated statements of operations data for the six months
ended July 31, 2014 and 2015 and the consolidated balance sheet data as of July 31, 2015 are derived from our unaudited consolidated financial statements included elsewhere in this prospectus. The unaudited consolidated financial
statements were prepared on a basis consistent with our audited financial statements. Our historical results are not necessarily indicative of the results that may be expected in any future period and our results for the six months ended
July 31, 2015 are not necessarily indicative of the results that may be expected for the full fiscal year. The selected consolidated financial data below should be read in conjunction with the section entitled Managements Discussion
and Analysis of Financial Condition and Results of Operations and our consolidated financial statements and related notes included elsewhere in this prospectus.

Fiscal Year EndedJanuary 31,

Six Months EndedJuly 31,

2013

2014

2015

2014

2015

(unaudited)

(in thousands, except per share data)

Consolidated Statements of Operations Data:

Revenue:

Product

$

5,474

$

39,228

$

154,836

$

53,253

$

134,810

Support

603

3,505

19,615

6,159

23,928

Total revenue

6,077

42,733

174,451

59,412

158,738

Cost of revenue:

Product(1)

3,605

19,974

63,425

22,608

50,353

Support(1)

709

4,155

14,127

4,924

14,421

Total cost of revenue

4,314

24,129

77,552

27,532

64,774

Gross profit

1,763

18,604

96,899

31,880

93,964

Operating expenses:

Research and development(1)

12,383

36,081

92,707

40,533

69,870

Sales and marketing(1)

10,727

54,750

152,320

71,563

107,844

General and administrative(1)

2,017

5,902

32,354

14,419

27,919

Total operating expenses

25,127

96,733

277,381

126,515

205,633

Loss from operations

(23,364

)

(78,129

)

(180,482

)

(94,635

)

(111,669

)

Other income (expense), net

(6

)

(141

)

(1,412

)

(307

)

(1,074

)

Loss before provision for income taxes

(23,370

)

(78,270

)

(181,894

)

(94,942

)

(112,743

)

Provision for income taxes

2

291

1,337

257

214

Net loss

$

(23,372

)

$

(78,561

)

$

(183,231

)

$

(95,199

)

$

(112,957

)

Net loss per share attributable to common stockholders, basic and
diluted(2)

$

(1.28

)

$

(3.24

)

$

(6.56

)

$

(3.66

)

$

(3.41

)

Weighted-average shares used in computing net loss per share attributable to common stockholders, basic and diluted(2)

18,239

24,237

27,925

25,976

33,154

Pro forma net loss per share attributable to common stockholders, basic and
diluted(2)

$

(1.26

)

$

(0.73

)

Weighted-average shares used in computing pro forma net loss per share attributable to common stockholders, basic and diluted(2)

Stock-based compensation expense for the fiscal years ended January 31, 2014 and 2015 and the six months
ended July 31, 2014 included $13.3 million, $27.6 million, and $27.6 million, respectively, of cash paid for the repurchase of common stock in excess of fair value. See Note 9 to our consolidated financial statements for additional information.

(2)

See Note 10 to our consolidated financial statements for an explanation of the method used to calculate our actual and pro forma basic and diluted net loss per share attributable to common stockholders and the
weighted-average number of shares used in the computation of the per share amounts.

The following discussion and analysis of our financial condition and results of operations should be read in conjunction with the section
titled Selected Consolidated Financial Data and our consolidated financial statements and related notes included elsewhere in this prospectus. This discussion contains forward-looking statements that involve risks and uncertainties. Our
actual results could differ materially from those discussed below. Factors that could cause or contribute to such differences include, but are not limited to, those identified below and those discussed in the section titled Risk Factors
included elsewhere in this prospectus. Our fiscal year end is January 31.

Overview

Our mission is to deliver data storage that transforms business through a dramatic increase in performance and reduction in complexity and
costs. Our innovative technology replaces storage systems designed for mechanical disk with all-flash systems optimized end-to-end for solid-state memory. At the same time, our innovative business model replaces the traditional forklift upgrade
cycle with an evergreen storage model of hardware and software upgrades and maintenance.

Our next-generation storage platform and
business model are the result of our teams substantial experience in enterprise storage and web-scale infrastructure, as well as frustration with the industrys status quo. Our platform can deliver a 10X acceleration in business
applications over legacy disk-based storage. It is also designed to be compatible with existing infrastructure, substantially more reliable and power and space efficient.

Our business model builds on our technology innovations to reverse the traditional storage business model. Instead of moving data between old
and new systems via forklift upgrades, we keep business data and applications in place and upgrade technology around it. Our platform and business model are designed to add value to customers for a decade or more, reducing total cost of storage
ownership while increasing loyalty.

We were incorporated in 2009 with a vision to define the next generation of enterprise storage by
pioneering the all-flash array category and innovating a customer-centric business model. We deliver our three-part integrated platform as the Purity Operating Environment, our flash-optimized software, FlashArray, our modular and
scalable all-flash array hardware, and Pure1, our cloud-based management and support. Since inception we have consistently expanded our technology and business model:



In 2012, we launched our first FlashArray and established our All Software Included model, which entitles customers to all Purity Operating Environment functionality in the base purchase price of a
FlashArray.



In 2013, we released Purity 3.0, which included writable snapshots and introduced our Love Your Storage Guarantee, a 30-day return guarantee program.



In 2014, we expanded our product family to address a broader series of customer requirements and workloads, and released Purity 4.0, which included replication. We also launched our Forever Flash program
to provide ongoing hardware upgrades as part of our maintenance and support agreements.

Since launching FlashArray in May 2012, our customer base has grown to over 1,100 customers. Our customers include large and mid-size
organizations across a diverse set of industry verticals, including cloud-based software and service providers, consumer web, education, energy, financial services, governments, healthcare, manufacturing, media, retail and telecommunications. We
define a customer as an end user that purchases our products and services either from one of our channel partners or from us directly. No customer represented over 10% of revenue for the fiscal years ended January 31, 2014 and 2015, and the six
months ended July 31, 2014 and 2015.

We have experienced significant growth, with revenue increasing from $6.1 million for the fiscal
year ended January 31, 2013 to $42.7 million for the fiscal year ended January 31, 2014 and to $174.5 million for the fiscal year ended January 31, 2015, representing year-over-year revenue growth of 603% and 308% for our two most
recent fiscal years. Our revenue increased from $59.4 million for the six months ended July 31, 2014 to $158.7 million for the six months ended July 31, 2015, representing period-over-period growth of 167% for our most recent interim
period. Our net loss was $23.4 million, $78.6 million, and $183.2 million, respectively, for the fiscal years ended January 31, 2013, 2014 and 2015 and $95.2 million and $113.0 million for the six months ended July 31, 2014 and
2015, respectively.

Since our founding, we have invested heavily in growing our business. Our headcount increased from approximately
100 employees as of January 31, 2013 to over 350 employees as of January 31, 2014 to over 800 employees as of January 31, 2015 and to over 1,100 employees as of July 31, 2015. We intend to continue to invest in our
research and development organization to extend our technology leadership, enhance the functionality of our existing storage platform and introduce new products. By investing in research and development, we believe we will be well positioned to
continue our rapid growth and take advantage of our large market opportunity. Our investments in research and development may result in enhancements or products that may not achieve adequate levels of market adoption, are more expensive to develop
than anticipated, may take longer to generate revenue or may generate less revenue than we anticipate. We expect that our results of operations and cash flows will be impacted by the timing, size and level of success of these product development
investments.

We also intend to continue to invest and expand our sales and marketing functions and channel programs, including expanding
our global network of channel partners and carrying out associated marketing activities in key geographies. By investing in sales and technical training, demand generation and partner programs, we believe we can enable many of our partners to
independently identify, qualify, sell and upgrade customers, with limited involvement from us. However, if we fail to effectively identify, train and manage our channel partners and to monitor their sales activity, as well as the customer support
and services being provided to our customers in their local markets, our business, operating results, financial condition and cash flows could be harmed.

In addition, we intend to expand and continue to invest in our international operations, which we believe will be an important factor in our
continued growth. However, even though our revenue generated from customers outside of the United States was 23% and 22% of our total revenue for the fiscal year ended January 31, 2015 and for the six months ended July 31, 2015,
respectively, our international operations are relatively new and we have limited experience operating in foreign jurisdictions. Our inexperience in operating our business outside of the United States increases the risk that our international
expansion efforts may not be successful.

As a result of our strategy to increase our investments in research and development, sales,
marketing, support and international expansion, we expect to continue to incur operating losses and negative cash flows from operations at least in the near future and may require additional capital resources to execute strategic initiatives to grow
our business.

Our Business Model

Currently, we sell our platform predominantly through a high touch, channel-fulfilled model. Our global sales force works collaboratively with
our channel partners. Our channel partners typically place orders with us upon receiving an order from a customer and do not stock inventory. Our sales organization is supported by systems engineers with deep technical expertise and responsibility
for pre-sales technical support and engineering for our customers. We support our channel partners through product education and sales and support training. We intend to continue to invest in the channel to add more partners and to expand our reach
to customers through our channel partners relationships. No channel partner represented over 10% of revenue for the fiscal years ended January 31, 2014 and 2015, and the six months ended July 31, 2014 and 2015.

Our business model enables customers to broadly adopt flash for a wide variety of workloads in
their datacenter, with some of our most innovative customers adopting all-flash datacenters. We do not charge separately for software, meaning that when a customer buys a FlashArray, all software functionality of the PurityOperating Environment is included in the base purchase price, and the customer is entitled to updates and new features as long as the customer maintains an active maintenance and support agreement. Product revenue is recognized at the time
title and risk of loss have transferred. Support revenue is recognized ratably over the term of the related maintenance and support agreement, generally ranging from 1 to 3 years. By keeping our business model simple and efficient, we allow
customers to buy more products and expand their footprint more easily while allowing us to reduce our sales and marketing costs.

To
deliver on the next level of operational simplicity and support excellence, we designed Pure1, our integrated cloud-based management and support. Pure1 enables our customers, support staff and partners to collaborate to achieve the
best customer experience and is included with an active maintenance and support agreement. In addition, our Forever Flash program provides our customers who continually maintain active maintenance and support for three years with an included
controller refresh with each additional three year maintenance and support renewal. In this way, our customers improve and extend the service life of their arrays, we reduce our cost of support by keeping the array modern and we encourage capacity
expansion. In accordance with multiple-element arrangement accounting guidance, we recognize the allocated revenue of the controllers and expense the related cost in the period in which we ship these controllers.

The combination of our high-performance, all-flash products, our exceptional support and our innovative business model has had a substantial
impact on customer success and loyalty and are strong drivers of both initial purchase and additional purchases of our products. As of July 31, 2015, more than half of our customers had made additional purchases within 12 months of their
initial purchase. For all customers that have been with us for at least 12 months as of July 31, 2015, for every $1 of initial product purchase, our top 25 customers on average spent $5.50 on new product purchases in the first 12 months
following their initial purchase and on average spent more than $8 on new product purchases in the first 18 months following their initial purchase. Across all customers that have been with us for at least 12 months as of July 31, 2015, for every $1
of initial product purchase, our customers on average spent more than $1 on new product purchases in the first 12 months following their initial purchase.

Factors Affecting Our Performance

Adoption of All-Flash Storage Systems

Organizations are increasingly replacing traditional disk-based systems with all-flash storage systems to achieve the performance they need.
Our success depends on the adoption of all-flash storage systems in IT infrastructures. Although flash is expected to penetrate the datacenter at a rapid rate, a lack of demand for all-flash storage systems for any reason, including technological
challenges associated with the use of all-flash memory, the cost or availability of all-flash memory or the adoption of competing technologies and products, would adversely affect our growth prospects. To the extent more organizations recognize the
benefits of all-flash memory in datacenter storage systems and as the adoption of all-flash memory storage technology increases, our target customer base will expand. Our business and results of operations will be significantly affected by the speed
with which organizations implement all-flash storage systems.

We believe that the all-flash storage market is still in the early stages of adoption. We intend
to target new customers by continuing to invest in our field sales force and extending our relationships with channel partners. We also intend to continue to target large customers including enterprises, service providers and government
organizations who have yet to adopt all-flash storage throughout their IT environment. A typical initial order

involves educating prospective customers about the technical merits and capabilities and potential cost savings of our products as compared to our competitors products. We believe that
customer references have been, and will continue to be, an important factor in winning new business. The average size of arrays deployed by our customers has increased over time. We expect this trend to continue and that a substantial portion of our
future sales will be sales to existing customers, including expansion of their arrays. We sell additional products and services to our customers as the data within their existing application deployments naturally grows and they migrate additional
applications to our all-flash storage platform. Our business and results of operations will depend on our ability to continue to add new customers and sell additional products to our growing base of customers.

Leveraging Channel Partners

We sell our products predominantly through a channel-fulfilled model. Our sales force supports our channel partners and is responsible for
large account penetration, global account coordination and overall market development. Our channel partners help market and sell our products, typically with assistance from our sales force. This joint sales approach provides us with the benefit of
direct relationships with substantially all of our customers and expands our reach through the relationships of our channel partners. We intend to continue to expand our partner relationships to further extend our distribution coverage and to invest
in education, training and programs to increase the ability of our channel partners to sell our products independently. Our business and results of operations will be materially affected by our success in leveraging our channel partners.

Investing in Research and Development for Growth

Our future performance will also depend on our ability to continue to innovate, improve functionality in our products and adapt to new
technologies or changes to existing technologies. We intend to continue to invest for long-term growth. Accordingly, we expect to continue to invest heavily in our product development efforts, including software development in the Purity
Operating Environment and Pure1 to further expand the capabilities and performance of our storage platform, hardware development in our FlashArray and future hardware platforms, and to introduce new products including new releases
and upgrades to our software and hardware. We expect that our results of operations will be impacted by the timing, size and level of success of these product development investments.

Components of Results of Operations

Revenue

We derive
revenue from the sale of our storage products and support services. Provided that all other revenue recognition criteria have been met, we typically recognize product revenue upon shipment, as title and risk of loss are transferred to our channel
partners at that time. Products are typically shipped directly by us to customers, and our channel partners do not stock our inventory. We expect our product revenue may vary from period to period based on, among other things, the timing and size of
orders and delivery of products and the impact of significant transactions.

We provide our support services pursuant to maintenance and
support agreements, which involve customer support, hardware maintenance and software upgrades for a period of generally 1 to 3 years. We recognize revenue from maintenance and support agreements over the contractual service period. We expect our
support revenue to increase as we add new customers and our existing customers renew maintenance and support agreements.

Cost of support revenue includes personnel costs associated with our customer support
organization and allocated overhead costs. Cost of support revenue also includes parts replacement costs. We expect our cost of support revenue to increase in absolute dollars as our support revenue increases.

Operating Expenses

Our operating expenses consist of research and development, sales and marketing and general and administrative expenses. Salaries and
personnel-related costs, including stock-based compensation, are the most significant component of each category of operating expenses. Operating expenses also include allocated overhead costs for facilities and IT costs.

Research and Development.Research and development expense consists primarily of employee compensation and related
expenses, prototype expenses, depreciation associated with assets acquired for research and development, third-party engineering and contractor support costs, as well as allocated overhead. We expect our research and development expense to increase
in absolute dollars, as we continue to invest in new products and existing products and build upon our technology leadership.

Sales
and Marketing. Sales and marketing expense consists primarily of employee compensation and related expenses, sales commissions, marketing programs, travel and entertainment expenses, as well as allocated overhead. Marketing programs consist of
advertising, events, corporate communications and brand-building activities. We expect our sales and marketing expense to increase in absolute dollars over time as we expand our sales force and increase our marketing resources, expand into new
markets and further develop our channel program.

General and Administrative. General and administrative
expense consists primarily of compensation and related expenses for administrative functions including finance, legal, human resources and fees for third-party professional services, as well as allocated overhead. We expect our general and
administrative expense to increase in absolute dollars as we incur additional costs related to operating as a publicly-traded company and continue to invest in the growth of our business.

Other Income (Expense), Net

Other income (expense), net consists primarily of gains and losses from foreign currency transactions and other income (expense).

Provision for Income Taxes

Provision for income taxes consists primarily of income taxes in certain foreign jurisdictions in which we conduct business and state income
taxes in the United States. We have recorded no U.S. federal income tax and provided a full valuation allowance for U.S. deferred tax assets, which includes net operating loss, or NOL, carryforwards and tax credits related primarily to research and
development. We expect to maintain this full valuation allowance for the foreseeable future as it is more likely than not that the assets will not be realized based on our history of losses.

The following tables set forth our results of operations for the periods presented in dollars and as a percentage of our revenue (in
thousands):

Fiscal Year EndedJanuary 31,

Six Months EndedJuly 31,

2014

2015

2014

2015

(unaudited)

Consolidated Statements of Operations Data:

Revenue:

Product

$

39,228

$

154,836

$

53,253

$

134,810

Support

3,505

19,615

6,159

23,928

Total revenue

42,733

174,451

59,412

158,738

Cost of revenue:

Product(1)

19,974

63,425

22,608

50,353

Support(1)

4,155

14,127

4,924

14,421

Total cost of revenue

24,129

77,552

27,532

64,774

Gross profit

18,604

96,899

31,880

93,964

Operating expenses:

Research and development(1)

36,081

92,707

40,533

69,870

Sales and marketing(1)

54,750

152,320

71,563

107,844

General and administrative(1)

5,902

32,354

14,419

27,919

Total operating expenses

96,733

277,381

126,515

205,633

Loss from operations

(78,129

)

(180,482

)

(94,635

)

(111,669

)

Other income (expense), net

(141

)

(1,412

)

(307

)

(1,074

)

Loss before provision for income taxes

(78,270

)

(181,894

)

(94,942

)

(112,743

)

Provision for income taxes

291

1,337

257

214

Net loss

$

(78,561

)

$

(183,231

)

$

(95,199

)

$

(112,957

)

(1)

Includes stock-based compensation expense as follows:

Fiscal Year EndedJanuary 31,

Six Months EndedJuly 31,

2014

2015

2014

2015

(unaudited)

(in thousands)

Cost of revenueproduct

$

253

$

303

$

229

$

96

Cost of revenuesupport

316

1,273

898

854

Research and development

11,477

22,512

15,147

10,429

Sales and marketing

9,014

22,466

17,361

5,980

General and administrative

506

6,479

4,508

3,300

Total stock-based compensation expense

$

21,566

$

53,033

$

38,143

$

20,659

Stock-based compensation expense for the fiscal years ended January 31, 2014 and 2015 and the six months ended July 31, 2014 included $13.3 million, $27.6 million, and $27.6 million, respectively, of cash paid
for the repurchase of common stock in excess of fair value. See Note 9 to our consolidated financial statements for additional information.

Total revenue increased by $99.3 million, or 167%, during the six months ended July 31, 2015 compared to
the six months ended July 31, 2014. The increase in product revenue was driven by higher sales to a growing number of new and existing customers. The number of customers grew from over 450 as of July 31, 2014 to over 1,100 as of
July 31, 2015. The increase in support revenue was driven primarily by an increase in maintenance and support agreements sold with increased product sales, as well as increased recognition of deferred support revenue.

Cost of revenue increased by $37.2 million, or 135%, for the six months ended July 31, 2015 compared
to the six months ended July 31, 2014. The increase in product cost of revenue was primarily driven by increased product sales and, to a lesser extent, by the increased costs in our manufacturing operations, including increased personnel costs
associated with increased headcount. The increase in support cost of revenue was primarily attributable to higher costs in our customer support organization primarily driven by personnel costs associated with increased headcount and an increase in
parts replacement in support of our maintenance and support agreements. Total headcount in these functions increased 165% from July 31, 2014 to July 31, 2015.

Total gross margin increased from 54% during the six months ended July 31, 2014 to 59% during the six months ended July 31, 2015.
Product gross margin increased 5 points from the six months ended July 31, 2014 to the six months ended July 31, 2015, primarily driven by a shift in the mix of products sold to our customers, as well as higher sales volume and lower
average component costs. Support gross margin increased 20 points from the six months ended July 30, 2014 to the six months ended July 31, 2015 primarily due to increased recognition of deferred support revenue resulting from the
increase in our customer base, as well as operational efficiencies.

Operating Expenses

Research and Development

Six Months EndedJuly 31,

Change

2014

2015

$

%

(dollars in thousands)

Research and development

$

40,533

$

69,870

$

29,337

72

%

Research and development expense increased by $29.3 million, or 72%, during the six months ended
July 31, 2015 compared to the six months ended July 31, 2014, as we continued to develop new and enhanced product offerings. The increase was primarily driven by an increase of $19.7 million in salary and related costs, as headcount
increased by 108% from July 31, 2014 to July 31, 2015. The remainder of the increase was primarily attributable to $6.0 million in depreciation expense on test equipment, $4.1 million in prototype expenses and $1.9 million
in professional services. These increases were partially offset by a decrease of $4.7 million in stock-based compensation expense. The decrease in stock-based compensation expense was due to additional expense of $9.5 million recognized for the
repurchase of common stock in connection with a tender offer during the six months ended July 31, 2014. There was no similar repurchase during the six months ended July 31, 2015.

Sales and marketing expense increased by $36.3 million, or 51%, during the six months ended July 31, 2015
compared to the six months ended July 31, 2014, as we grew our sales force and expanded our geographic footprint. The increase was primarily driven by an increase of $19.1 million in salary and related costs, an increase of $7.1 million in
commission expense, as headcount increased by 67% from July 31, 2014 to July 31, 2015. The remainder of the increase was primarily attributable to $8.3 million in marketing programs partly related to a new product launch, $4.9 million in
professional services and $3.6 million in travel and entertainment expense. These increases were partially offset by a decrease of $11.4 million in stock-based compensation expense. The decrease in stock-based compensation expense was due to
additional expense of $13.9 million recognized for the repurchase of common stock in connection with a tender offer during the six months ended July 31, 2014. There was no similar repurchase during the six months ended July 31, 2015.

General and Administrative

Six Months EndedJuly 31,

Change

2014

2015

$

%

(dollars in thousands)

General and administrative

$

14,419

$

27,919

$

13,500

94

%

General and administrative expense increased by $13.5 million, by 94%, during the six months ended
July 31, 2015 compared to the six months ended July 31, 2014. The increase was primarily due to an increase of $3.2 million in salary and related costs, as we increased our headcount by 153% from July 31, 2014 to July 31, 2015.
Additionally, legal, consulting, accounting and audit fees increased by $9.7 million as we expanded internationally and prepared to become a public company. These increases were partially offset by a decrease of $1.2 million in stock-based
compensation expense. The decrease in stock-based compensation expense was due to additional expense of $3.4 million recognized for the repurchase of common stock in connection with a tender offer during the six months ended July 31, 2014. There was
no similar repurchase during the six months ended July 31, 2015.

In September 2015, we issued 700,000 shares of Class B common stock
to the Pure Good Foundation. As a result, we expect to incur a non-cash general and administrative expense in the three months ending October 31, 2015 equal to the fair value of the shares of Class B common stock issued to the Pure Good
Foundation.

Other Income (Expense), Net

Six Months EndedJuly 31,

Change

2014

2015

$

%

(dollars in thousands)

Other income (expense), net

$

(307

)

$

(1,074

)

$

(767

)

(250)%

Other income (expense), net decreased during the six months ended July 31, 2015 compared to the six
months ended July 31, 2014 primarily due to an increase in foreign currency transactions and related expenses as we expanded internationally.

The provision for income taxes was primarily related to foreign taxes as we continued our global
expansion.

Comparison of the Fiscal Years Ended January 31, 2014 and 2015

Revenue

Fiscal Year EndedJanuary 31,

Change

2014

2015

$

%

(dollars in thousands)

Product revenue

$

39,228

$

154,836

$

115,608

295%

Support revenue

3,505

19,615

16,110

460%

Total revenue

$

42,733

$

174,451

$

131,718

308%

Total revenue increased by $131.7 million, or 308%, during the fiscal year ended January 31, 2015
compared to the fiscal year ended January 31, 2014. The increase in product revenue was driven by higher sales to a growing number of customers. The number of customers grew from approximately 200 as of January 31, 2014 to over 700 as of
January 31, 2015. The increase in support revenue was driven primarily by an increase in maintenance and support agreements sold with higher product sales, as well as the full year revenue impact from such agreements sold in the previous year.

Cost of Revenue and Gross Margin

Fiscal Year EndedJanuary 31,

Change

2014

2015

$

%

(dollars in thousands)

Product cost of revenue

$

19,974

$

63,425

$

43,451

218%

Support cost of revenue

4,155

14,127

9,972

240%

Total cost of revenue

$

24,129

$

77,552

$

53,423

221%

Product gross margin

49%

59%

Support gross margin

(19)%

28%

Total gross margin

43%

56%

Cost of revenue increased by $53.4 million, or 221%, for the fiscal year ended January 31, 2015 compared
to the fiscal year ended January 31, 2014. The increase in product cost of revenue was primarily driven by increased product sales and, to a lesser extent, by the increased costs in our manufacturing operations, including increased personnel
costs associated with increased headcount. The increase in support cost of revenue was primarily attributable to higher costs in our customer support organization primarily driven by personnel costs associated with increased headcount and an
increase in parts replacement in support of our maintenance and support agreements. Total headcount in these functions increased 176% from January 31, 2014 to January 31, 2015.

Total gross margin increased from 43% during the fiscal year ended January 31, 2014 to 56%
during the fiscal year ended January 31, 2015. Product gross margin increased 10 points from the fiscal year ended January 31, 2014 to the fiscal year ended January 31, 2015, primarily driven by higher sales volume and lower average
component costs. Support gross margin increased 47 points from the fiscal year ended January 31, 2014 to the fiscal year ended January 31, 2015 primarily due to increased recognition of deferred support revenue resulting from the increase
in our customer base as well as operational efficiencies.

Operating Expenses

Research and Development

Fiscal Year EndedJanuary 31,

Change

2014

2015

$

%

(dollars in thousands)

Research and development

$

36,081

$

92,707

$

56,626

157

%

Research and development expense increased by $56.6 million, or 157%, during the fiscal year ended
January 31, 2015 compared to the fiscal year ended January 31, 2014, as we continued to develop new and enhanced product offerings. The increase was primarily driven by an increase of $33.0 million in employee and related costs, including
an increase of $11.0 million in stock-based compensation expense, as we increased our headcount by 115% from January 31, 2014 to January 31, 2015. The remainder of the increase was primarily attributable to $9.7 million in prototype
expenses, $6.6 million in depreciation expense on test equipment and $3.6 million in professional services.

Sales and Marketing

Fiscal Year EndedJanuary 31,

Change

2014

2015

$

%

(dollars in thousands)

Sales and marketing

$

54,750

$

152,320

$

97,570

178

%

Sales and marketing expense increased by $97.6 million, or 178%, during the fiscal year ended January 31,
2015 compared to the fiscal year ended January 31, 2014, as we grew our sales force and expanded our geographic footprint. The increase was primarily driven by an increase of $69.5 million in employee and related costs, including an increase of
$16.7 million in commission expense and an increase of $13.5 million in stock-based compensation expense, as we increased our headcount by 115% from January 31, 2014 to January 31, 2015. The remainder of the increase was primarily
attributable to $10.6 million in marketing programs, $6.2 million in travel and entertainment expense, $6.2 million in allocated overhead costs for facilities and $3.3 million in professional services.

General and Administrative

Fiscal Year EndedJanuary 31,

Change

2014

2015

$

%

(dollars in thousands)

General and administrative

$

5,902

$

32,354

$

26,452

448

%

General and administrative expense increased by $26.5 million, or 448%, during the fiscal year ended
January 31, 2015 compared to the fiscal year ended January 31, 2014. The increase was primarily due to an increase of $12.2 million in employee and related costs, including an increase of $6.0 million in stock-based compensation expense,
as we increased our headcount by 188% from January 31, 2014 to January 31, 2015.

Additionally, legal, consulting, accounting and audit fees increased by $9.7 million as we expanded internationally and prepared to become a public company. The remainder of the increase was
primarily attributable to an increase of $2.9 million in allocated overhead costs for facilities.

Other Income (Expense), Net

Fiscal Year EndedJanuary 31,

Change

2014

2015

$

%

(dollars in thousands)

Other income (expense), net

$

(141

)

$

(1,412

)

$

(1,271

)

901%

Other income (expense), net decreased during the fiscal year ended January 31, 2015 compared to the
fiscal year ended January 31, 2014 primarily due to an increase in foreign currency transactions and related expenses.

Provision for Income Taxes

Fiscal Year EndedJanuary 31,

Change

2014

2015

$

%

(dollars in thousands)

Provision for income taxes

$

291

$

1,337

$

1,046

359%

The provision for income taxes increased during the fiscal year ended January 31, 2015 compared to the
fiscal year ended January 31, 2014 primarily due to an increase in foreign taxes as we continued our global expansion.

The following tables summarize our selected unaudited quarterly consolidated statements of operations data for each of the six quarters in the
period ended July 31, 2015. The information for each of these quarters has been prepared on a basis consistent with our audited annual financial statements and, in the opinion of management, includes all adjustments of a normal, recurring nature
that are necessary for the fair presentation of the results of operations for these periods in accordance with generally accepted accounting principles in the United States. This data should be read in conjunction with our audited consolidated
financial statements included elsewhere in this prospectus. Our historical results are not necessarily indicative of the results that may be expected in the future and our results for the three months ended July 31, 2015 are not necessarily
indicative of the results that may be expected for the full fiscal year.

Three Months Ended

April 30,2014

July 31,2014

October 31,2014

January 31,2015

April 30,2015

July 31,2015

(unaudited)

(in thousands)

Consolidated Statements of Operations Data:

Revenue:

Product

$

22,166

$

31,087

$

43,753

$

57,830

$

63,618

$

71,192

Support

2,482

3,677

5,436

8,020

10,459

13,469

Total revenue

24,648

34,764

49,189

65,850

74,077

84,661

Cost of revenue:

Product (1)

9,793

12,815

16,676

24,141

22,712

27,641

Support (1)

1,795

3,129

3,827

5,376

6,924

7,497

Total cost of revenue

11,588

15,944

20,503

29,517

29,636

35,138

Gross profit

13,060

18,820

28,686

36,333

44,441

49,523

Operating expenses:

Research and development (1)

12,807

27,726

22,863

29,311

31,682

38,188

Sales and marketing (1)

25,115

46,448

38,224

42,533

48,327

59,517

General and administrative (1)

4,925

9,494

7,415

10,520

12,692

15,227

Total operating expenses

42,847

83,668

68,502

82,364

92,701

112,932

Loss from operations

(29,787

)

(64,848

)

(39,816

)

(46,031

)

(48,260

)

(63,409

)

Other income (expense), net

(122

)

(185

)

(410

)

(695

)

(703

)

(371

)

Loss before provision for income taxes

(29,909

)

(65,033

)

(40,226

)

(46,726

)

(48,963

)

(63,780

)

Provision for income taxes

139

118

171

909

157

57

Net loss

$

(30,048

)

$

(65,151

)

$

(40,397

)

$

(47,635

)

$

(49,120

)

$

(63,837

)

(1)

Includes stock-based compensation expense as follows:

Cost of revenueproduct

$

73

$

156

$

35

$

39

$

56

$

40

Cost of revenuesupport

86

812

160

216

333

521

Research and development

2,432

12,715

3,399

3,966

3,625

6,804

Sales and marketing

1,436

15,925

2,315

2,790

3,444

2,536

General and administrative

424

4,084

823

1,148

1,401

1,899

Total stock-based compensation expense

$

4,451

$

33,692

$

6,731

$

8,159

$

8,859

$

11,800

Stock-based compensation expense for the three months ended
July 31, 2014 included $27.6 million of cash paid for the repurchase of common stock in excess of fair value. See Note 9 to our consolidated financial statements for additional information.

Our quarterly revenue increased sequentially for all periods presented due primarily to higher sales reflecting increased demand for our
products and related support services. The sequential growth in product revenue was driven primarily by higher sales of our storage products to new and existing customers. The sequential growth in support revenue was primarily driven by a higher
number of maintenance and support agreements sold with increased product sales, as well as increased recognition of deferred support revenue. We expect to experience seasonal fluctuations in our revenue from time to time with the fourth quarter
historically being our strongest quarter for sales as a result of large enterprise buying patterns.

Quarterly Gross Profit and
Gross Margin Trends

Gross profit in absolute dollar terms increased sequentially for all periods presented, primarily due to
growth in revenue. Sequential fluctuations in gross margin was primarily driven by a shift in the mix of products sold to our customers, as well as timing of employee hiring as we continued to build out our customer support organization. During the
three months ended July 31, 2014, cost of revenue included stock-based compensation expense of $855,000 related to the repurchase of common stock from employees in a tender offer.

Quarterly Expense Trends

Total operating expenses generally increased sequentially for all periods presented primarily due to the addition of personnel in connection
with the expansion of our business. Sales and marketing expense increased from the three months ended April 30, 2015 to the three months ended July 31, 2015 primarily due to expenditures on marketing programs related to the launch of
FlashArray//m. During the three months ended July 31, 2014, total operating expenses included stock-based compensation expense of $26.8 million related to the repurchase of common stock from employees in a tender offer, of which
$9.5 million, $13.9 million, and

$3.4 million were allocated to research and development, sales and marketing, general and administrative expenses, respectively.

Liquidity and Capital Resources

As of
July 31, 2015, we had cash and cash equivalents of $128.3 million. Our cash and cash equivalents primarily consist of bank deposits and money market funds. We have generated significant operating losses and negative cash flows from
operations as reflected in our accumulated deficit of $454.5 million. We expect to continue to incur operating losses and negative cash flows from operations at least in the near future and may require additional capital resources to execute
strategic initiatives to grow our business.

To date, we have financed our operations principally through private placements of our
convertible preferred stock. Through July 31, 2015, we have received net proceeds of $543.9 million from the issuance of shares of our convertible preferred stock and we have repurchased $78.2 million of shares of common stock from our
employees. We believe our existing cash and cash equivalents, our credit facility and cash provided by this offering will be sufficient to fund our operating and capital needs for at least the next 12 months. Our future capital requirements will
depend on many factors including our growth rate, the timing and extent of spending to support development efforts, the expansion of sales and marketing and international operation activities, the timing of new product introductions and the
continuing market acceptance of our products and services. We may in the future enter into arrangements to acquire or invest in complementary businesses, services and technologies, including intellectual property rights. We may be required to seek
additional equity or debt financing. In the event that additional financing is required from outside sources, we may not be able to raise it on terms acceptable to us or at all. If we are unable to raise additional capital when desired, our
business, operating results and financial condition would be adversely affected.

In August 2014, we entered into a two-year revolving
line of credit facility to provide up to $15.0 million based on 80% of qualifying accounts receivable. Borrowings under the line of credit bear interest at the lenders prime rate plus 1%. The revolving line of credit facility is collateralized
by substantially all of our assets, excluding any intellectual property. It also contains various covenants, including covenants related to the delivery of financial and other information, as well as limitations on dispositions, mergers,
consolidations and other corporate activities. As of January 31, 2015 and July 31, 2015, we had no borrowings from this line of credit and we were in compliance with all financial covenants.

In September 2015, we entered into a non-binding engagement letter with Silicon Valley Bank for a credit facility pursuant to which Silicon
Valley Bank would serve as the lead arranger of a syndicate of banks. Affiliates of Morgan Stanley & Co. LLC, Goldman, Sachs & Co. and Barclays Capital Inc. may participate in such syndicate. The engagement letter contemplates a
credit facility of between $50.0 million and $125.0 million and would be collateralized by substantially all of our assets. The credit facility is expected to contain customary financial and operational covenants.

As of January 31, 2015 and July 31, 2015, we had letters of credit in the aggregate amount of $4.6 million and $4.6 million,
respectively, in connection with our headquarter facility lease. The letters of credit are collateralized by restricted cash in the same amount and mature at various dates through January 2021.

The following table summarizes our cash flows for the periods presented:

Net cash used in operating activities during the six months ended July 31, 2015 was $44.5 million, which resulted from a net loss of
$113.0 million, partially offset by non-cash charges of $20.7 million for stock-based compensation expense and $14.3 million for depreciation and amortization and net cash inflows of $33.5 million from changes in operating assets and liabilities.
The net cash inflows from changes in operating assets and liabilities was primarily the result of a $49.8 million increase in deferred revenue and a $13.9 million increase in accrued compensation and other liabilities and accounts payable. The
inflows were partially offset by a $21.0 million increase in accounts receivable, $4.9 million increase in deferred commissions and $2.6 million increase in prepaid expenses and other assets. The increase in deferred revenue was primarily due
to new sales order growth during the six months ended July 31, 2015. The increases in accounts receivable, accrued compensation and other liabilities and accounts payable were primarily attributed to revenue growth and increased activities to
support overall business growth.

Net cash used in operating activities during the six months ended July 31, 2014 was
$83.0 million, which resulted from a net loss of $95.2 million, partially offset by non-cash charges of $10.5 million for stock-based compensation expense, $5.4 million for depreciation and amortization and net cash outflows of
$3.7 million from changes in operating assets and liabilities. The net cash outflows from changes in operating assets and liabilities was primarily the result of increases of $19.5 million in accounts receivable and $9.3 million in
inventory, as well as an increase of $2.1 million in deferred commissions, partially offset by an increase of $21.2 million in deferred revenue and an increase of $7.4 million in accrued compensation and other liabilities and accounts
payable. The increases in accounts receivable, deferred commissions and deferred revenue were primarily due to revenue and new sales order growth during the year. The increase in inventory was a result of increased purchases to meet higher demand
for our products. Net cash used in operating activities also included $27.6 million of cash paid for the repurchase of common stock from our employees in excess of fair value.

Net cash used in operating activities during the fiscal year ended January 31, 2015 was $143.7 million, which resulted from a net
loss of $183.2 million and net cash outflows of $1.5 million from changes in operating assets and liabilities, partially offset by non-cash charges of $25.4 million for stock-based compensation and $15.4 million for depreciation and
amortization. The net cash outflows from changes in operating assets and liabilities was primarily the result of increases of $44.2 million in accounts receivable, $13.7 million in inventory, $9.8 million in deferred commissions and
$6.6 million in prepaid expenses and other assets, partially offset by increases of $56.8 million in deferred revenue and $15.9 million in accrued compensation and other liabilities and accounts payable. The increase in accounts
receivable, deferred revenue and deferred commissions was primarily due to revenue and new sales order growth during the year. The increase in inventory, accrued compensation and other liabilities and accounts payable was primarily attributed to
increased activities to support overall business growth. Net cash used in operating activities also included $27.6 million of cash paid for the repurchase of common stock from our employees in excess of fair value.

Net cash used in operating activities during the fiscal year ended January 31, 2014 was $67.2 million, which resulted from a net
loss of $78.6 million and net cash outflows of $1.5 million from changes in operating assets and liabilities, partially offset by non-cash charges of $8.3 million for stock-based compensation and $4.4 million for depreciation and amortization.
The net cash outflows from changes in operating assets and liabilities was primarily the result of increases of $12.0 million in accounts receivable, $7.1 million in deferred commissions, $5.1 million in inventory and $4.4 million in
prepaid expenses and other assets, partially offset by increases of $15.1 million in deferred revenue and $12.0 million in accrued compensation and other liabilities and accounts payable. The increase in accounts receivable, deferred revenue
and deferred commissions was primarily due to revenue and new sales order growth during the year. The increase in inventory, accrued compensation and other liabilities and accounts payable was primarily attributed to increased activities to support
overall business growth. Net cash used in operating activities also included $13.3 million of cash paid for the repurchase of common stock from our employees in excess of fair value.

Net cash used in investing activities during the six months ended July 31, 2015 of $21.8 million resulted from capital expenditures.

Net cash used in investing activities during the six months ended July 31, 2014 of $28.9 million resulted from capital
expenditures of $19.2 million, purchases of intangible assets of $8.0 million and a $1.6 million increase in restricted cash related to a security deposit for new office space.

Net cash used in investing activities during the fiscal year ended January 31, 2015 of $53.0 million resulted from capital
expenditures of $42.2 million, purchases of intangible assets of $9.1 million and $1.6 million increase in restricted cash related to a security deposit for new office space.

Net cash used in investing activities during the fiscal year ended January 31, 2014 of $15.3 million resulted from $12.3 million of
capital expenditures and $3.0 million of restricted cash related to a security deposit for new office space.

Financing Activities

Net cash provided by financing activities of $1.9 million during the six months ended July 31, 2015 was primarily due to
$3.0 million of proceeds from the exercise of stock options, which was partially offset by payments of deferred offering costs of $1.1 million.

Net cash provided by financing activities of $255.5 million during the six months ended July 31, 2014 was primarily due to
$280.7 million in proceeds primarily from the issuances of our Series F convertible preferred stock and $5.0 million of proceeds from the exercise of stock options. These increases were partially offset by $30.1 million of repurchases
of common stock from our employees.

Net cash provided by financing activities of $258.5 million during the fiscal year ended
January 31, 2015 was primarily due to $281.0 million in net proceeds from the issuances of our Series E, Series F and Series F-1 convertible preferred stock and $7.7 million of proceeds from the exercise of stock options including proceeds from
repayment of promissory notes, partially offset by $30.1 million of repurchases of common stock from our employees.

Net cash provided by
financing activities of $163.3 million during the fiscal year ended January 31, 2014 was primarily due to $167.8 million in net proceeds from the issuance of our Series E convertible preferred stock and $2.7 million of proceeds from the
exercise of stock options, partially offset by $7.2 million repurchase of common stock from our employees.

Contractual Obligations and Commitments

The following table summarizes our non-cancellable contractual obligations as of January 31, 2015.

Purchase orders
are not included in the table above. Our purchase orders represent authorizations to purchase rather than binding agreements. The contractual commitment amounts in the table above are associated

with agreements that are enforceable and legally binding. Obligations under contracts that we can cancel without a significant penalty are not included in the table above.

During the six months ended July 31, 2015, we entered into a non-cancelable contract of $1.1 million related to certain software
services payable through 2018.

In August 2015, we entered into certain lease agreements for office facilities with total lease
obligations of approximately $19.7 million with lease periods expiring through 2023. In connection with these leases, we are required to maintain letters of credit of up to $3.3 million.

Off Balance Sheet Arrangements

During
the fiscal years ended January 31, 2014 and 2015 and the six months ended July 31, 2015, we did not have any relationships with any entities or financial partnerships, such as structured finance or special purpose entities established for the
purpose of facilitating off-balance sheet arrangements or other purposes.

Provision for Income Taxes

As of January 31, 2015, we had U.S. federal and state NOL carryforwards of $300.0 million and $308.4 million that expire commencing in
2029. Under Section 382 of the U.S. Internal Revenue Code of 1986, or the Code, a corporation that undergoes an ownership change is subject to limitations on its ability to utilize its pre-change NOLs to offset future taxable
income. In December 2014, we completed an analysis through July 2014 to evaluate whether there are any limitations of our NOLs and concluded no limitations currently exist. While we do not believe that we have experienced, or will experience in
connection with this offering, an ownership change that would result in limitations, regulatory changes, such as suspension on the use of NOLs, could result in the expiration of our NOLs or otherwise cause them to be unavailable to offset future
income tax liabilities.

Quantitative and Qualitative Disclosures about Market Risk

We have operations both within the United States and internationally, and we are exposed to market risk in the ordinary course of our business.

Interest Rate Risk

Our cash and cash equivalents primarily consist of bank deposits and money market funds. As of January 31, 2015 and July 31, 2015, we
had cash and cash equivalents of $192.7 million and $128.3 million. The carrying amount of our cash equivalents reasonably approximates fair value, due to the short maturities of these instruments. The primary objectives of our investment
activities are the preservation of capital, the fulfillment of liquidity needs and the fiduciary control of cash and investments. We do not enter into investments for trading or speculative purposes. Our investments are exposed to market risk due to
a fluctuation in interest rates, which may affect our interest income and the fair market value of our investments. However, due to the short-term nature of our investment portfolio, we do not believe an immediate 10% increase or decrease in
interest rates would have a material effect on the fair market value of our portfolio. We therefore do not expect our operating results or cash flows to be materially affected by a sudden change in market interest rates.

Foreign Currency Risk

Our sales contracts are primarily denominated in U.S. dollars with a small number of contracts denominated in foreign currencies. A portion of
our operating expenses are incurred outside the United States and denominated in foreign currencies and are subject to fluctuations due to changes in foreign currency exchange rates, particularly changes in the British pound and Euro. Additionally,
fluctuations in foreign currency exchange rates may cause us to recognize transaction gains and losses in our statement of operations. Given the impact of foreign currency exchange rates has not been material to our historical operating results, we
have not entered into

derivative or hedging transactions, but we may do so in the future if our exposure to foreign currency should become more significant.

Critical Accounting Policies and Estimates

Our financial statements are prepared in accordance with U.S. generally accepted accounting principles, or GAAP. The preparation of these
financial statements requires us to make estimates and assumptions that affect the reported amounts of assets, liabilities, revenue, expenses, and related disclosures. We evaluate our estimates and assumptions on an ongoing basis. Our estimates are
based on historical experience and various other assumptions that we believe to be reasonable under the circumstances. Our actual results could differ from these estimates.

The critical accounting estimates, assumptions and judgments that we believe have the most significant impact on our consolidated financial
statements are described below.

Revenue Recognition

We derive revenue from two sources: (1) product revenue which includes hardware and embedded software and (2) support revenue which
includes customer support, hardware maintenance and software upgrades on a when-and-if-available basis.

We recognize revenue when:



Persuasive evidence of an arrangement existsWe rely upon sales agreements and/or purchase orders to determine the existence of an arrangement.



Delivery has occurredWe typically recognize product revenue upon shipment, as title and risk of loss are transferred to our channel partners at that time. Products are typically shipped directly by us to
customers, and our channel partners do not stock our inventory.



The fee is fixed or determinableWe assess whether the fee is fixed or determinable based on the payment terms associated with the transaction.



Collection is reasonably assuredWe assess collectability based on credit analysis and payment history.

Our product revenue is derived from the sale of hardware and operating system software that is integrated into the hardware and therefore
deemed essential to its functionality. The hardware and the operating system software essential to the functionality of the hardware are considered non-software deliverables and, therefore, are not subject to industry-specific software revenue
recognition guidance.

Support revenue is derived from the sale of maintenance and support agreements. Maintenance and support agreements
include the right to receive unspecified software upgrades and enhancements on a when-and-if-available basis, bug fixes, parts replacement services related to the hardware, as well as access to our cloud-based management and support platform.
Revenue related to maintenance and support agreements are recognized ratably over the contractual term, which generally range from 1 to 3 years. Costs related to maintenance and support agreements are expensed as incurred. In addition, our
Forever Flash program provides our customers who continually maintain active maintenance and support for three years with an included controller refresh with each additional three year maintenance and support renewal. In accordance with
multiple-element arrangement accounting guidance, the controller refresh represents an additional deliverable that is a separate unit of accounting. The allocated revenue is recognized and the related cost is expensed in the period in which these
controllers are shipped.

Most of our arrangements, other than stand-alone renewals of maintenance and support agreements, are
multiple-element arrangements with a combination of product and support related deliverables (as defined above). Under multiple-element arrangements, we allocate consideration at the inception of an arrangement to all deliverables based on the
relative selling price method in accordance with the hierarchy provided by the multiple-

element arrangement accounting guidance, which includes (i) vendor-specific objective evidence, or VSOE, of selling price, if available; (ii) third-party evidence, or TPE, of selling
price, if VSOE is not available; and (iii) best estimate of selling price, or BESP, if neither VSOE nor TPE is available. As discussed below, because we have not established VSOE for any of our deliverables and TPE typically cannot be obtained,
we typically allocate consideration to all deliverables based on BESP.



VSOEWe determine VSOE based on our historical pricing and discounting practices for the specific products and services when sold separately. In determining VSOE, we require that a substantial majority of
the stand-alone selling prices fall within a reasonably narrow pricing range. We have not established VSOE for any of our hardware and support related deliverables given that our pricing is not sufficiently concentrated (based on an analysis of
separate sales of the deliverables) to conclude that we can demonstrate VSOE of selling prices.



TPEWhen VSOE cannot be established for deliverables in multiple-element arrangements, we apply judgment with respect to whether we can establish a selling price based on TPE. TPE is determined based on
competitor prices for interchangeable products or services when sold separately to similarly situated customers. However, because our products contain a significant element of proprietary technology and our solutions offer substantially different
features and functionality, the comparable pricing of products with similar functionality typically cannot be obtained.



BESPWhen neither VSOE nor TPE can be established, we utilize BESP to allocate consideration to deliverables in a multiple element arrangement. Our process to determine our BESP for products and services is
based on qualitative and quantitative considerations of multiple factors, which primarily include historical sales, margin objectives and discount behavior. Additional considerations are given to other factors such as customer demographics, costs to
manufacture products or provide services, pricing practices and market conditions.

Deferred Commissions

Deferred commissions consist of direct and incremental costs paid to our sales force related to customer contracts. The deferred commission
amounts are recoverable through the revenue streams that will be recognized under the related customer contracts. Direct sales commissions are deferred when earned and amortized over the same period that revenue is recognized from the related
customer contract. Amortization of deferred commissions is included in sales and marketing expense in the consolidated statements of operations.

Stock-Based Compensation

We measure and recognize compensation expense for all stock-based awards granted to our employees and other service providers, including stock
options and restricted stock awards, based on the estimated fair value of the award on the grant date. We use the Black-Scholes option pricing model to estimate the fair value of stock option awards. The fair value of restricted stock awards is
determined based on the fair value of our Class B common stock estimated as part of the capital stock and business enterprise valuation process. The fair value is recognized as an expense, net of estimated forfeitures, on a straight line basis
over the requisite service period. For stock-based awards granted to employees with a performance condition, we recognize stock-based compensation expense for these awards under the accelerated attribution method over the requisite service period
when management determines it is probable that the performance condition will be satisfied.

Our use of the Black-Scholes option pricing
model requires the input of highly subjective assumptions, including the fair value of the underlying common stock, expected term of the option, expected volatility of the price of our common stock, risk-free interest rates and the expected dividend
yield of our Class B common stock. The assumptions used in our option pricing model represent managements best estimates. These estimates involve inherent uncertainties and the application of managements judgment. If factors change
and different assumptions are used, our stock-based compensation expense could be materially different in the future.

Fair Value of Class B Common Stock. As our stock is not publicly traded, we must estimate the fair value of our common stock, as discussed in Common Stock Valuations below.



Expected Term. The expected term represents the period that our stock-based awards are expected to be outstanding. The expected term assumptions were determined based on the vesting terms, exercise terms and
contractual lives of the options.



Expected Volatility. Since we do not have a trading history of our Class B common stock, the expected volatility is determined based on the historical stock volatilities of our comparable companies.
Comparable companies consist of public companies in our industry which are similar in size, stage of life cycle and financial leverage. We intend to continue to apply this process using the same or similar public companies until a sufficient amount
of historical information regarding the volatility of our own share price becomes available, or unless circumstances change such that the identified companies are no longer similar to us, in which case, more suitable companies whose share prices are
publicly available would be used in the calculation.



Risk-Free Interest Rate. The risk-free interest rate is based on the implied yield available on U.S. Treasury zero-coupon issues with remaining terms similar to the expected term on the options.



Dividend Rate. We have never declared or paid any cash dividends and do not plan to pay cash dividends in the foreseeable future, and, therefore, use an expected dividend yield of zero.

The following table summarizes the assumptions used in the Black-Scholes option-pricing model to determine the fair value of our stock options
for employees and non-employees:

Fiscal Year Ended January 31,

Six Months Ended July 31,

2014

2015

2014

2015

(unaudited)

Expected term (in years)

5.3 - 10.0

5.0 - 10.0

5.4 - 10.0

6.0 - 7.4

Expected volatility

62% - 69%

55% - 68%

62% - 68%

48% - 52%

Risk-free interest rate

0.8% - 2.6%

1.3% - 2.6%

2.0% - 2.5%

1.5% - 1.9%

Dividend rate









Fair value of common stock

$1.46 - $2.98

$4.81 - $12.65

$4.81 - $9.40

$14.12 - $18.16

In addition, we are required to estimate the expected forfeiture rate and only recognize expense for those
shares that are expected to vest. We estimate the expected forfeiture rate based on historical experience and our expectations regarding future pre-vesting termination behavior of employees and other service providers. To the extent our actual
forfeiture rate is different from our estimate, stock-based compensation expense is adjusted accordingly.

We will continue to use
judgment in evaluating the assumptions related to our stock-based compensation on a prospective basis. As we continue to accumulate additional data related to our Class B common stock, we may refine our estimation process, which could
materially impact our future stock-based compensation expense.

Common Stock Valuations

The fair value of the Class B common stock underlying our stock options was determined by our board of directors. The valuations of our
Class B common stock were determined in accordance with the guidelines outlined in the American Institute of Certified Public Accountants Practice Aid, Valuation of Privately-Held-Company Equity Securities Issued as
Compensation. In the absence of a public trading market, our board of directors, with input from management, exercised significant judgment and considered numerous objective and subjective factors to determine the fair value of our
Class B common stock as of the date of each option grant, including the following factors:

the prices, rights, preferences and privileges of our convertible preferred stock relative to those of our Class B common stock;



the lack of marketability of our Class B common stock;



our actual operating and financial performance;



current business conditions and projections;



our hiring key personnel and the experience of our management;



our history and the timing of the introduction of new products and services;



our stage of development;



the likelihood of achieving a liquidity event, such as an initial public offering or a merger or acquisition of our business given prevailing market conditions;



the illiquidity of stock-based awards involving securities in a private company;



the market performance of comparable publicly traded companies;



recent private stock sales transactions; and



U.S. and global capital market conditions.

In valuing our Class B common stock, the fair
value of our business, or Enterprise Value, was determined using an income approach and a market approach. The Enterprise Value determined was then adjusted to: (1) add back cash on hand and tax benefits from NOLs and (2) remove certain
long-term liabilities in order to determine an equity value, or Equity Value. The resulting Equity Value was then allocated to the Class B common stock using combination of the option pricing method and a Probability Weighted Expected Return
Method. After the Equity Value is determined and allocated to the various classes of shares, a discount for lack of marketability, or DLOM is applied to arrive at the fair value of the Class B common stock. A DLOM is applied based on the theory
that as a private company an owner of the stock has limited opportunities to sell this stock and any such sale would involve significant transaction costs, thereby reducing overall fair market value.

Our assessments of the fair value of the Class B common stock for grant dates between the dates of the valuations were based in part on
the current available financial and operational information and the Class B common stock value provided in the most recent valuation as compared to the timing of each grant. For financial reporting purposes, we considered the amount of time
between the valuation date and the grant date to determine whether to use the latest Class B common stock valuation or a straight-line calculation between the two valuation dates. This determination included an evaluation of whether the
subsequent valuation indicated that any significant change in valuation had occurred between the previous valuation and the grant date.

Once we are operating as a public company, we will rely on the closing price of our Class A common stock as reported by the NYSE on the
date of grant to determine the fair value of our Class A common stock.

Based on the assumed initial public offering price per
share of $17.00, which is the midpoint of the offering price range set forth on the cover page of this prospectus, the aggregate intrinsic value of our outstanding stock awards as of July 31, 2015 was $749.7 million, of which
$306.3 million related to vested awards and $443.4 million related to unvested awards.

Recent Accounting Pronouncement

In May 2014, the Financial Accounting Standards Board, or FASB, issued Accounting Standards Update No. 2014-09 Revenue from Contracts
with Customers, or ASU 2014-09. ASU 2014-09 supersedes the revenue recognition requirements in Revenue Recognition (Topic 605), and requires entities to recognize revenue when it transfers promised goods or services to customers in an
amount that reflects the consideration to which the entity

expects to be entitled to in exchange for those goods or services. In August 2015, the FASB issued Accounting Standards update No. 2015-14 Revenue from Contracts with Customers, or ASU
2015-14. ASU 2015-14 defers the effective date for ASU 2014-09, and accordingly the effective date for us commences on February 1, 2018 and early adoption is allowed for our fiscal year beginning February 1, 2017. This standard will be applied using
either the full or modified retrospective adoption methods. We are currently evaluating adoption methods and the impact of this standard on our consolidated financial statements.

Most storage companies are beginning to use flash memory to try to deliver higher performance data storage. At Pure, we are transforming the
storage industry. Yes, we are delivering faster storage, but we are also delivering radically simpler storageimagine storage with the ease of use of a smartphone. At the same time, we are changing the way storage is sold and maintained,
delivering a dramatically better customer experience at a lower overall cost. We have focused on making storage so fast and so economical that organizations can do things with their data and applications that would never have been possible with
their existing storage.

We call ourselves Puritans, and we proudly wear orange. In addition to assembling an outstanding team, we have
built a special company culture, which we call the entrepreneurial workforce:



Everyone at Pure is an owner and is empowered like oneWe strive for transparency, sharing as much information as possible with the whole company. We communicate the bad news as well as the good, so that all
can contribute to making our products, our customers experiences and our company better;



We emphasize team rather than individual successWe win together and we lose and learn together. We focus on growing the pie rather than playing politics to carve it up;



We behave more like missionaries than mercenariesPuritans are striving to make the world of IT better. We focus on doing the right thing for the long term, not on looking for short cuts; and



Most of all, we focus on supreme customer and partner satisfactionWhen a customer has an issue, even if the problem lies outside of Pure, Puritans pitch in to make things right. We endeavor to do our jobs
so well that customers and partners love our storage platform and love working with our company.

As we
recruit new Puritans, we look for and reinforce these values. The quality of our team is by far our most valuable asset.

We believe that
the market opportunity in front of Pure Storage is substantial. While we have executed well to date, we are even more excited about the road ahead:



We are investing heavily in research and development to deliver the multiple and substantive storage innovations we believe are necessary to accomplish our mission and execute on the opportunity before us;



We are going the extra mile to make our storage platform so simple and easy to use that it will continue to delight our customers;



We are striving to replace the 3 to 5 year rip-and-replace storage cycle with evergreen storage and cloud-based management and support; and



We are investing aggressively in sales, marketing and our channel to maximize growth and market share.

In short, we plan to continue to manage Pure in the same fashion as we have managed Pure as a private companystriving to do the right
thing for the long term rather than optimizing for the near term.

We are thrilled to welcome those of you who will join us on our
journey, as customers, partners, employees or as shareholders. We have the opportunity to build a large and enduring independent company, which we see as the best outcome for all of our constituencies.

Our mission is to deliver data
storage that transforms business through a dramatic increase in performance and reduction in complexity and costs. Our innovative technology replaces storage systems designed for mechanical disk with all-flash systems optimized end-to-end for
solid-state memory. At the same time, our innovative business model replaces the traditional forklift upgrade cycle with an evergreen storage model of hardware and software upgrades and maintenance.

Our next-generation storage platform and business model are the result of our teams substantial experience in enterprise storage and
web-scale infrastructure, as well as frustration with the industrys status quo. This deep industry understanding led to the development of our three-part integrated platform: the Purity Operating Environment, our flash-optimized
software, FlashArray, our modular and scalable all-flash array hardware, and Pure1, our cloud-based management and support. Our platform can deliver a 10X acceleration in business applications over legacy disk-based storage. It is also
designed to be compatible with existing infrastructure, substantially more reliable, and power and space efficient.

Our business model
builds on our technical innovations to reverse the traditional storage business model. Instead of moving data between old and new systems via forklift upgrades, we keep business data and applications in place and upgrade technology around it. Our
platform and business model are designed to add value to customers for a decade or more, reducing total cost of storage ownership while increasing loyalty.

Our innovations help rebalance the datacenter by closing the performance gap between legacy storage technology and servers and networks. But
it is the simplicity of our platform and business model that is revolutionizing the enterprise storage experience. Together, our innovations have helped our customers realize the promise of the cloud model for IT and the benefits of Moores
Law. This has yielded industry-leading Net Promoter scores, based on the results of customer satisfaction surveys we conducted.

Since launching FlashArray in May 2012, our customer base has grown to over 1,100 customers. Our customers include large and
mid-size organizations across a diverse set of industry verticals, including cloud-based software and service providers, consumer web, education, energy, financial services, governments, healthcare, manufacturing, media, retail and
telecommunications. Our platform is used for a broad set of storage use cases, including database applications, private and public cloud infrastructure, virtual server infrastructure and virtual desktop infrastructure. Our platform helps customers
increase employee productivity, improve operational efficiency, make better decisions through faster, more accurate analytics and deliver more compelling user experiences to their customers and partners.

We sell our platform predominantly through a high touch, channel-fulfilled model. Our sales force works collaboratively with our global
network of distribution and channel partners, which provides us broad sales reach while maintaining direct customer engagement.

We have
experienced significant growth. Our revenue increased from $6.1 million for the fiscal year ended January 31, 2013 to $42.7 million for the fiscal year ended January 31, 2014 and to $174.5 million for the fiscal year ended January 31,
2015, representing year-over-year revenue growth of 603% and 308% for our two most recent fiscal years. Our revenue increased from $59.4 million for the six months ended July 31, 2014 to $158.7 million for the six months ended
July 31, 2015, representing period-over-period growth of 167% for our most recent interim period. Our net loss was $23.4 million, $78.6 million and $183.2 million for the fiscal years ended January 31, 2013, 2014 and 2015, respectively,
and $95.2 million and $113.0 million for the six months ended July 31, 2014 and 2015, respectively. For the fiscal year ended January 31, 2015 and the six months ended July 31, 2015, 77% and 78% of our revenue was from the
United States, and 23% and 22% from the rest of the world, respectively.

Technology continues to transform businessredefining how products and services are built, how customers and partners are served and how
organizations innovate. As a result, organizations face the urgent need to operate with greater speed and to leverage technology to be smarter and more innovative. Indeed, the speed, agility and efficiency of an organizations information
systems contribute to and, in many cases, even define competitive advantage.

Organizations must make technology investments that improve
IT performance and in parallel reduce the cost and complexity of their operations. Technology that can quickly adapt to ever-changing requirements and drive these dual and seemingly opposed requirements of improving both performance and efficiency
is essential.

Business Transformation through Improved Performance

The speed of servers and networks has dramatically improved over the past several decades, but the performance of disk-based storage has not
kept up. Mechanical disk has fundamental physical limitations in reading and writing data and typically operates in milliseconds, 1,000 times slower than the microsecond processing speed of todays computing and networking systems. Disk-based
storage is now an obstacle to application performance, squandering investments in fast servers that may spend a substantial portion of processing time waiting for disks to seek and rotate to deliver data.

Flash memory is a solid-state storage technology that can eliminate this storage bottleneck while providing better performance, greater
storage density and improved power efficiency as compared to disk. For instance, a 1TB flash device can perform 64 operations in parallel while a 1TB disk can only perform a single operation at a time. Flash memory has transformed todays
consumer technology experienceit is the storage media inside smartphonesand now it is time for business to enjoy those same benefits. The price performance of flash technology, too, has improved dramatically in recent years. Already,
leading web-scale companies such as Apple, Facebook and Google are utilizing flash-based storage in their datacenters.

Even when
retrofitted with flash, legacy approaches to storage generally fall short. Too often, they rely on legacy storage software, which was optimized for the serial and sequential read and write patterns of disk. They do not take full advantage of the
parallelizable and random access nature of flash. Even modern hybrid storage approachesthose that pair flash and disk designsare inadequate, as they suffer from the speed of the far

slower disk operations. For example, even if 90% of data read and write operations are processed on flash technology and 10% of operations are processed on disk, applications can suffer from
nearly a 5X performance reduction as compared to all-flash storage.

IT Transformation through Reduced Costs and
Complexity

Cloud computing has been one of the more compelling IT advances in years. Today, organizations use
shared resources in the cloud, significantly reducing the cost and complexity of operations and datacenters. Organizations around the world are now adopting many of the core tenets of this cloud model to transform their own operations and
datacenters.

Legacy disk-based storage is generally inconsistent with the design tenets of the cloud. It does not scale easily, and is
complex and costly to manage, often requiring expert consultants for routine operations. Most legacy disk-based storage requires organizations to replace their storage systems every 3 to 5 years. This is expensive and worrisome for customers, who
must juggle upgrades and downtime during the data migration period. The result is an endless and time-consuming cycle of procurement, provisioning and troubleshooting of data storage.

Next-Generation Storage

With the increased demands of a complex and changing business environment, we believe organizations not only desire but also require a new
storage platform that combines the following:



Dramatically improved performance to keep up with the demands of the business;

Seamless interoperability for compatibility with existing IT infrastructure investments;



Simplicity, agility, easy automation and elasticity to enable the cloud model of IT; and



Greater price performance and reduced total cost of ownership.

Market Opportunity

Pure Storage serves the market for enterprise storage and related storage software. According to IDC, the combined worldwide spend by
enterprises on external storage hardware priced at more than $50,000 per array and storage and device management, storage infrastructure and storage replication software is estimated to grow from approximately $24.2 billion in 2014 to $27.0 billion
in 2018. Hardware spend in this area alone will grow from $16.5 billion in 2014 to $18.0 billion in 2018, while software spend will grow from $7.7 billion in 2014 to $9.0 billion in 2018. Customers are increasingly replacing traditional disk-based
systems with all-flash storage, and spend on all-flash solutions is expected to grow from $1.3 billion in 2014 to $3.3 billion in 2018, representing a 26.6% compounded annual growth rate. We believe the benefits of next-generation flash storage will
drive flash to ultimately become the predominant form of primary enterprise data storage.

Pure Storage is defining the next generation of enterprise data storage. We have pioneered the all-flash array category and have coupled
that with our customer-centric business model. Our storage platform integrates the Purity Operating Environment, our flash-optimized software, FlashArray, our modular and scalable all-flash array hardware, and Pure1, our
cloud-based management and support. This platform, combined with ongoing maintenance and support, provides an evergreen storage solution that enables our customers to both accelerate business performance and increase the efficiency, agility
and simplicity of their operations. We believe that our approach is having a profound impact both on our customers and on the data storage industry as a whole:



Business Transformation. With Pure Storage, customers business applications run fasterhelping them to improve yields, employee productivity, and
customer and partner experiences, allowing them to make smarter decisions, and enabling them to increase innovation across their organizations.



Faster Business. A provider of cardiac-monitoring services can have its technicians analyze more patient data65 patient records per day versus 35 per day, gaining operational efficiency that
positively impacts its bottom line.



Smarter Business. An auto parts retailer can run reports to optimize inventory across over one hundred locations and millions of products in about 12 hours, down from seven days, allowing it to reduce
inventory on hand while increasing the breadth of products held in inventory.



More Innovative Business. A web-based image publishing service can eliminate a storage bottleneck with a 5x improvement in performance, giving it confidence to deploy new products without fear that user
experience would suffer.



Technology Transformation. Our platform increases the efficiency, agility and simplicity of IT infrastructure, enabling our customers to reduce the cost and complexity of operations and implement the cloud
model. Technology transformations for customers who adopt our storage platform include:



Reduced Cost and Complexity. Our customers can adopt our evergreen storage model, which we have designed to eliminate disruptive technology refreshes and extend the life of storage investments. We
estimate that, over a six year period, our customers can save an average of more than $500,000 annually for every 250TB of tier-1 performance disk storage replaced with our storage platform.

Implement the Cloud Model. The combination of our modular and scalable FlashArray hardware and our software-defined management capabilities allows customers to consolidate a variety of workloads on
a single storage platform. The operational simplicity, quick provisioning, easy programmability, low management overhead and linear, low-cost scaling of our platform enable a more cloud-style model for storage.

The following differentiates our storage platform:



High Performance. Our FlashArray and Purity Operating Environment software were specifically architected for the fast parallelizable and random access of flash. The
result is that customers caneliminate more than one year of cumulative application latency every month as compared to legacy disk-based storage in typical deployments.



Enterprise Resiliency. Our platform, through the Purity Operating Environment, enables customers to maintain continuous access to their data without a loss in performance. The
Purity Operating Environment efficiently and redundantly stores data, ensuring that data is available at all times, even in the event of hardware or software component failures or during upgrades. In addition, the Purity Operating
Environment allows customers to recover from disasters using near zero overhead snapshots, which can be replicated to multiple locations globally. All of these resiliency features are built-in and do not require additional licenses.



Simplicity. Our platform is simple to deploy, manage, and upgrade for a wide variety of customer use casesthe basic operating commands fit on a single, folding business card. Our platform is designed
to seamlessly integrate with existing investments in server and application infrastructure.



Agile Management. Through Pure1, we deliver an integrated cloud-based management and support experience. We originate most of the support interactions we have with our customers, consistent with our
proactive focus on helping our customers quickly respond to issues and stay ahead of changes to their storage requirements. We offer multiple software interfaces for customers to automate the operation of our storage platform at cloud scale. By
combining simplicity, automation and proactive support, we reduce the administrative burden and the risk of human error.



Evergreen Storage. Our platform is designed to support customer deployments for a decade or more. Our modular all-flash array hardware and software enable enterprises to start as small as 10TBs and to
scale storage deployments to petabyte levels. Through our innovative business model, we provide software updates, any needed hardware replacements, and a controller refresh every three years so customers can run the latest Purity Operating
Environment for predictable maintenance fees.



Compelling Economics. Our FlashReduce software achieves on average greater than 5-to-1 data reduction for a wide range of enterprise applications. We utilize consumer-grade flash
memory, which is more cost effective and reliable than enterprise-grade flash memory. Consumer-grade flash prices are now approaching those of performance disk on a raw capacity basis. As a result, customers can achieve price-performance levels that
enable our platform to be deployed across a wide range of use cases.



Lower Total Cost of Ownership. Our platform reduces the space, power, cooling, management overhead and other associated expenses as compared to disk-based storage. A study commissioned by us
from Forrester Consulting found that a composite organization could expect to recoup its investment in our storage system within 14 months and achieve a 102% risk-adjusted return on investment from reduced operational costs and increased business
benefits over a three-year period.

Growth Strategies

Key elements of our growth strategy include:



Relentlessly Innovate and Maintain Technology Leadership. We will continue to invest in product innovation and technology leadership and
plan to enhance our flash-optimized software, modular and scalable hardware and cloud-based management and support. We have released multiple generations of our FlashArray products since our founding in 2009 and release enhanced software
versions of our

Purity Operating Environment with new features approximately every six months. We believe that continued innovation is critical to addressing the complex and changing requirements of data
storage and that maintaining our technology leadership will help us expand our addressable market.



Continue to Drive Large Customer Adoption. We believe that our market is large and untapped as a significant number of enterprises, service providers and government organizations have yet to
adopt all-flash storage throughout their technology infrastructure. We intend to grow our base of customers by promoting our platform, increasing our investment in sales and marketing and leveraging our network of channel partners. We are investing
in our account teams to cultivate strong relationships with our larger customers, which, in collaboration with our channel partners, should allow us to further penetrate large enterprises across all verticals, industries and geographies.



Further Leverage our Channel Ecosystem. We have been successful in using a channel-focused model to drive our sales, and we continue to believe that by partnering with the channel and service
providers, we can reach the broadest number of customers. By investing in training, demand generation and partner programs, we believe we can enable many of our partners to independently identify, qualify, sell and upgrade customers, with limited
involvement from us. We intend to continue to invest in our channel to add scalable distribution partners, systems integration partners and service provider partners, including providers of cloud-based infrastructure offerings.



Drive Greater Penetration into our Existing Customer Base. We believe our over 1,100 customers represent a significant opportunity for us to realize incremental sales. We sell additional products and
services to our customers as the data within their existing application deployments naturally grows and as customers migrate additional applications to our platform. As of January 31, 2015, more than half of our customers had made additional
purchases within 12 months of their initial purchase. In addition, we estimate that we have only penetrated a small portion of the total footprint in many of our larger customers.



Cultivate our Inspirational Culture. We believe our culture is a critical part of our success. We strive to maintain an exciting and supportive atmosphere that attracts great talent and
inspires our employees to excel and deliver a differentiated experience for our customers. The five core values upon which our Puritan company culture is based are customer-first, creativity, teamwork, persistence and ownership. These values
permeate our company and help define our business, customer, shareholder and employee objectives.



Leverage our Technology Ecosystem. We have developed strategic relationships with a number of technology vendors to allow integration of our platform with their offerings, enabling a streamlined experience
for our customers. We have developed FlashStack, our converged infrastructure offering which incorporates best of breed solutions from Cisco, VMware, Citrix and Microsoft, and we also have developed a variety of application-specific
solutions, including optimizing our platform for high performance database applications such as Oracle, SAP and Microsoft and virtual infrastructure such as VMware, Citrix and OpenStack.

Innovative Technology and Business Model

Our next-generation storage platform is comprised of three integrated components, all designed from the ground-up for solid-state
storage: the Purity Operating Environment, our flash-optimized software; FlashArray, our modular and scalable all-flash array hardware; and Pure1, our cloud-based management and support. These three components are complemented
by our innovative business model, which is designed to improve our customers experience related to the procurement, upgrade, expansion and ownership of storage.

The heart of our storage platform is the Purity Operating Environment, our proprietary software that runs across all
FlashArray generations and is included with the purchase of our hardware. Key features of our Purity Operating Environment include:



FlashReduce:Data reduction technologies to reduce the effective cost of flash. FlashReduce combines inline deduplication, inline compression, and background reduction technologies to
maximize the amount of data that can be stored on the flash media, thereby reducing its effective cost per gigabyte. Our proprietary FlashReduce technology employs a variable block size reduction and can deliver up to 2X better data reduction
as compared to the leading competitive products, resulting in an average of greater than 5-to-1 data reduction across a wide range of use cases and data types.



FlashProtect:Enterprise-grade reliability and data protection. FlashProtect implements high availability, or HA, enabling the FlashArray to self heal in the face of hardware or
software failures, and RAID-3D dual parity protection to ensure that flash device failures, latent bit errors or slow response within a particular flash device do not have any impact on the overall array. FlashProtect is designed to maintain
performance through these failures and enables our arrays to be easily upgraded without scheduled downtime, setting new expectations for storage resiliency. The Purity Operating Environment also implements strong data-at-rest encryption of
all data, all the time.

FlashCare:Extends life and ensures performance of consumer-grade flash. FlashCare extends the life expectancy and improves the performance and reliability of flash by writing data in a
manner that is optimized for the geometry of flash. FlashCare enables a FlashArray to effectively mix multiple generations, types and suppliers of flash, allowing flexibility and expandability over time for our customers as well as
providing supplier flexibility for Pure.

FlashArray Hardware

FlashArray is a modular all-flash storage array designed to maximize the performance and density of flash, optimize the advanced
software services that the Purity Operating Environment provides, and minimize overall solution cost for customers. We have brought four generations of FlashArray to market, and we are currently selling both the FlashArray
400-Series and the newer FlashArray//m, which we announced in June 2015. The FlashArray 400-Series features independent controllers and storage shelves, while the latest generation FlashArray//m features a chassis-based design,
fully integrating HA controllers and flash in a single appliance. FlashArray//m is based upon an in-house hardware design enabling us to further optimize performance, density and cost. FlashArray is built around the following
principles and innovations:



Modularity and Upgradability. All FlashArrays are designed to be modular and upgradable over time, enabling our vision of evergreen storage and eliminating the 3 to 5 year forklift refresh
cycle of legacy storage systems. We have advanced this modular design in FlashArray//m, which, similar to blade servers, provides a long-lived chassis that affords easy customization to serve growing deployments, evolving use cases and
incremental improvement over time. Our compute-efficient design enables the non-disruptive introduction of new modules and expansion of arrays.



Rapid Innovation. Our FlashArrays are based upon two core technologies, Intel CPUs and consumer-grade flash memory,
both of which have historically improved consistent with Moores Law. Consumer-grade flash has been the first to introduce improved features and functionality and continues to lead flash memory innovations. The FlashArrays modular
design allows us to deliver both processor and flash upgrades approximately every 9 to 12 months, and enables customers to adopt these advances within their existing FlashArrays without data migration, downtime or performance

impact. We intend to continue to release new hardware modules and software features and updates for the FlashArray on a more rapid pace than our legacy competitors.



Maximum Performance. Our FlashArrays are designed to maximize the performance of flash. FlashArray//m leverages native high bandwidth and low latency PCIe/NVMe networking to
modules and controllers, a SAS fabric for external expansion and high-performance non-volatile RAM and flash modules. As a result, our FlashArrays deliver hundreds of thousands of storage input/output operations per second at less than 1
millisecond average latency, which is generally at least 10X faster than traditional disk-based storage.



High Density, Low Cost. We have introduced cost and density improvements in each succeeding generation of our FlashArray. FlashArray//m fully-integrates controller and flash modules inside
the three rack unit chassis, allowing for significant component cost reduction and increase density. More importantly, the FlashArray//m often utilizes one-tenth the power and space as compared to the legacy disk-based storage it replaces.



Simplicity and Reliability. Our FlashArray//m consolidates all components into an appliance-like form factor to improve simplicity and reliability. With a single component to rack, install and
service, the FlashArray//m is designed to be extremely simple without sacrificing the scalability and upgradability of an enterprise array. Overall system reliability is also improved by removing unnecessary components, such as cables, cards
and shelves, each of which adds failure risk to the system. Uptime across our FlashArray install base is approaching 99.9999% based on a three month rolling average and has exceeded 99.999% since early 2013.



End-to-End Flash Optimization. Because we both design our FlashArray chassis, controllers and flash modules in-house, and develop all of our Purity Operating Environment
software specifically for our hardware, we are able to realize end-to-end optimizations between software and flash. This allows us to deliver solutions with high density and power efficiency, tight integration for simplicity and at a lower cost. We
expect further synergies in this regard as we continue our innovation more deeply in end-to-end hardware and software optimization.

Pure1 Management and Support

Pure1 is a cloud-based management and support platform that enables our customers, our support staff and our partners to seamlessly and
securely collaborate to maximize the reliability of the Pure Storage platform while minimizing management overhead and cost to the customer. Our cloud-based platform removes the need for dedicated storage management infrastructure, enables customers
to monitor a global storage deployment from a mobile device and simplifies integration with other datacenter management solutions. Our FlashArrays embed our Pure1 technology, which creates an always-on support connection to
Pure Storage, sending telemetric data to Pure to help us deliver a more proactive management and support experience. This approach has helped to drive high levels of customer satisfaction. We have a Net Promoter score of approximately 80, based on
customer satisfaction surveys we conducted through August 2015. Pure1 consists of three integrated modules:



Pure1 Manage is an integrated suite of on-array and cloud-based management tools that perform multi-array monitoring and management tasks. In addition, Pure1 maintains detailed
performance and capacity utilization information for years, allowing customers to analyze historical performance and capacity growth to plan for future deployments. The Pure1 management model is dramatically simpler than that of the legacy
storage platformsthe basic operating commands fit on a single, folding business card. In our view, only by removing decades of accumulated complexity from the management model of legacy storage can we achieve the promise of the
software-defined, cloud-friendly datacenter.

Pure1 Connect includes a comprehensive set of automation interfaces, with both full command-line interface and REST API access to all management functions of the FlashArray.
Pure1 also includes connectors to popular virtualization platforms such as VMware vSphere and OpenStack, allowing our customers to natively manage the FlashArray from within their virtualization management tools.



Pure1 Support couples our innovative support technology and cloud automation with highly skilled engineers to proactively deliver a superior support experience. By using automated analytics
to monitor our customers arrays, we can detect and alert customers proactively of potential problems and ensure that when one customer has an issue, other customers at risk are identified and notified. With Pure1, we initiate most
support calls to the customer. When issues are identified we can often resolve them in conjunction with the customer before they have an impact on overall array health. Pure1 also includes a RemoteAssist capability, which enables our support
personnel, with customer approval, to log in to a FlashArray and perform resolution and even routine maintenance tasks, removing even more of the storage management burden from customers.

Pure1 Support is offered in two levels: Advanced and Premium. We do not offer basic support service, as we believe
that every customer deployment is critical and deserves 24x7 support. Pure1 Support Advancedincludes 24x7 phone support with 30-minute maximum response time for critical issues, proactive monitoring,and a next-business-day
service level for on-site replacement of failed hardware components. Pure1 Support Premium expands upon the service level of Advanced by reducing the maximum response time to 15 minutes for critical issues and reducing the service level
for on-site parts replacement to 4 hours.

Business Model Innovation

In addition to our product leadership and differentiated customer experience, our business model innovation helps us achieve our vision
of evergreen storage. We believe that the traditional storage business model is expensive, resource intensive and detrimentally impacts customer operations. Pures alternative approach is designed to eliminate this pain. We believe that
it will be difficult for legacy storage vendors to copy our business model innovations given their dependence on complex licensing programs and regular forklift array replacement upgrades. We have created the following business model innovations and
programs:



All Software Included. All software functionality of the Purity Operating Environment is included in the base purchase price of a FlashArray, and our customers receive software updates and
new features at no additional cost, so long as the customer maintains an active maintenance and support agreement. This approach is attractive to customers for its simplicity and fairness.



Forever Flash. Our Forever Flash program is a new approach to the storage array purchase and expansion lifecycle, which is enabled by our modular FlashArray hardware. Forever
Flash provides an alternative to the traditional 3 to 5 year replacement cycle, instead allowing customers to incrementally improve array performance and capacity as needed, dramatically reducing cost and risk while increasing predictability.
This enables customers to both extend the useful life of their hardware and avoid the cost and risk of recurring data migration. The Forever Flash program has three components that encourage ongoing ownership, expansion and continuous
improvements in performance:



Flat and Fair. Our maintenance and support renewal rates are flat over time for a given array purchased by a customer, effectively serving as a promise that we will not increase the cost of maintenance in
out years as many other vendors do.



Free Every Three. Customers who continually maintain active maintenance and support for three years are entitled to an included controller refresh with each additional three year maintenance and support
renewal. This modernizes a deployed FlashArray, enables the latest performance, features and scale and encourages capacity expansion while reducing our support costs.

Forever Maintenance. We will replace any failed hardware components, including flash media, indefinitely as long as a customer maintains active maintenance and support. This alleviates customer concerns
over flash wear-out over time. We have seen low failure rates of our flash hardware during actual use, and we have designed this hardware to sustain more than a decade of operation.



Love Your Storage Guarantee. Our Love Your Storage Guarantee program was designed to help customers avoid the need to conduct proof of concept testing before purchase. Instead customers can buy a
FlashArray for a given deployment with the assurance that if they are not satisfied with the purchase for any reason, they can return it for a full refund within 30 days.

Our Customers

We target large and
medium-sized enterprises, state, local and federal governments, schools and healthcare organizations globally. Our customer base includes over 1,100 organizations as of July 31, 2015 and included over 30, 200 and 700 organizations as of January 31,
2013, 2014 and 2015, respectively. We have deployed our storage platform with customers across multiple industry verticals. Our storage platform has been deployed in some of the largest and most sophisticated enterprise infrastructures in the world
as well as smaller organizations with limited IT expertise or budget, such as hospitals, municipalities and school districts. Actual customer deployments range from a single FlashArray that can store a few terabytes of data to dozens of
FlashArrays that, in the aggregate, can store multiple petabytes of data. Our customers include over 10% of the Fortune 500, and more than 100 of our customers have purchased over $1 million of our products and support. No individual customer
represented more than 10% of our revenue in the fiscal year ended January 31, 2015 and the six months ended July 31, 2015.

The
following is a list of representative customers by industry segment:

The following are representative examples of how some of our customers have benefited from typical deployments of our storage platform:

LinkedIn

Situation: LinkedIn is the leading social network for business professionals worldwide, with more than 364 million members
globally. By 2012, LinkedIns rapid growth necessitated a new storage solution that would allow it to better deliver a seamless web experience to its users and run the internal applications critical to its business.

Solution and Benefit: For LinkedIn, the implementation of the FlashArray has driven long-term cost reductions, improved
efficiency for its IT team and provided better business analytics for its internal teams. Since deploying the FlashArray, LinkedIn has decreased data access times to consistently less than 1 millisecond, for a total reduction of 3-5
milliseconds, resulting in a dramatic improvement in experience for both LinkedIn members and internal teams. With an average of 5.5:1 data reduction and upwards of 20:1 data reduction on read replicas and Oracle development environments, LinkedIn
was able to decrease its storage footprint by 10X, while decreasing operational costs for power, cooling and rack space by 8X.

With the
snapshot and cloning functionality of the Purity Operating Environment, LinkedIn has optimized its process for database refreshes, taking the process from over 24 hours to minutes. Since the initial deployment in 2012, LinkedIn has continued
to expand the use of the FlashArray from front-end applications such as LinkedIn.com to Oracle testing and development, data warehouse and virtual server and virtual desktop deployments.

ConocoPhillips

Situation: ConocoPhillips is the worlds largest independent exploration and production company, based on proved reserves and
production of liquids and natural gas. In 2014, ConocoPhillips was faced with increasing maintenance bills and complexity with its existing storage system. ConocoPhillips wanted a simple solution that was within its budget and would allow it to be
faster and more agile, while reducing space, power and cooling requirements.

Solution and Benefit: After extensive testing,
ConocoPhillips purchased multiple FlashArrays based on its simplicity and performance advantages, and its cost effectiveness. The ease of deployment and native replication were key factors relative to more complex alternative solutions that
required installation of external software. The FlashArrays provided consistently high performance, enabling ConocoPhillips to confidently run financial reports 2X more frequently. In addition, with overall data reduction rates of over 4:1,
the implementation of the FlashArrays enabled ConocoPhillips to reduce space requirements for the relevant systems by about 80%, condensing 14 data center floor tiles down to 3, with related power requirements decreased by over 90%, as
compared to its existing disk-based storage systems. In fact, the switch to the FlashArray dropped the temperature by two degrees and the total power consumption by 2% across the entire data center. ConocoPhillips saw all of these benefits at
a price at or below the cost of equivalent disk-based systems.

New York-Presbyterian Hospital

Situation: New York-Presbyterian Hospital (NYPH) is an academic medical center located in New York City and is ranked among the top ten
hospitals in the United States. In 2014, NYPH was seeking to upgrade the storage underlying its virtual desktop and virtual server infrastructure, as well as the storage underlying a reporting application for its outpatient practices, and decided to
test the FlashArray against an all-flash array from a legacy storage vendor. As a busy, leading hospital, NYPH was sensitive to any disruption or downtime, so selection of the right solution was critical.

Solution and Benefit: After an extensive six-month proof of concept trial, NYPH selected
the FlashArray for its resiliency and data reduction capabilities, as well as its ability to scale to support thousands of virtual desktop users and virtual server workloads. Only the FlashArray met NYPHs failure and upgrade
requirements and it had 2X better data reduction rates as compared to the competitive solution. NYPH transitioned its reporting application for its out-patient practices to the FlashArray with impressive results: the nightly batch report ran
in just 2 hours, down from 10 hours on the hospitals existing storagea 5X reduction.

NYPH later purchased additional capacity
to add more workloads to the FlashArray. The installation was completed in minutes, without any downtime or performance interruption. The FlashArrays data reduction rates have allowed NYPH to realize the benefits of flash at or
below the cost of disk-based storage, while the simplicity of the FlashArray allowed NYPH to eliminate the complex tiering associated with spinning disk. With the FlashArray, NYPH is ensuring an improved end user experience for
doctors, nurses and staff and timely report generation to enable prompt and accurate decision making by NYPH leadership.

Nielsen

Situation: With a presence in more than 100 countries and services covering more than 90 percent of the worlds GDP
and population, Nielsen is a global consumer research firm that major consumer brands rely on for insights into how they should manage their business. Data is the lifeblood of Nielsens business, which is why, in 2014, it made the decision to
modernize some of its legacy disk-based storage to FlashArray, which handles this data more quickly, efficiently and effectively.

Solution and Benefit: FlashArray has given Nielsen a 3X reduction in latencyit has also replaced 50 racks of disk-based
storage with just 5 racks of FlashArrays.

Sales and Marketing

Sales.We sell our storage platform predominantly through a high touch, channel-fulfilled sales model. Our
sales organization supports our channel partners and is responsible for large-account penetration, global account coordination and overall market development. Our channel partners help market and sell our products, typically with assistance from our
sales force. This joint sales approach provides us with the benefit of direct relationships with substantially all of our customers and expands our reach through the relationships of our channel partners. In certain geographies we sell through a
two-tier distribution model. We also sell to service providers that deploy our products and offer cloud-based storage services to their customers.

We intend to continue to expand our partner relationships to further extend our sales coverage and to invest in education, training and
programs to increase the ability of our channel partners to sell our products independently. We expect to continue to grow our sales organization and expand our international sales presence. Generally, our sales representatives have become more
productive the longer they are with us, with limited productivity in their first few quarters as they learn to sell our products and participate in classroom and field training. We optimize our sales management efforts to help our sales
representatives optimize their productivity throughout their tenure. Our sales organization is supported by sales engineers with deep technical expertise and responsibility for pre-sales technical support, solutions engineering for our customers and
technical training for our channel partners. No individual channel partner represented more than 10% of our revenue in the fiscal year ended January 31, 2015 and the six months ended July 31, 2015.

Technology Alliances. We work closely with technology partners that help us deliver world-class solutions to our customers and
ensure the efficient deployment and support of their datacenter infrastructure. Our technology partners include application partners such as Microsoft, Oracle and SAP and infrastructure partners such as Arista, Brocade, Cisco, Citrix, CommVault,
RedHat, Symantec and VMware. In addition, we work closely with our technology partners through co-marketing and lead-generation activities in an effort to broaden our marketing reach and help us win new and retain existing customers.

Our research and development efforts are focused primarily on improving our existing products and developing new products. Our products
integrate both software and hardware innovations, and accordingly, our research and development teams employ both software and hardware engineers in the design, development, testing, certification and support of our products. Most of our research
and development team is based in Mountain View, California. We also design, test and certify our products to ensure interoperability with a variety of third-party software, servers, operating systems and network components. We plan to dedicate
significant resources to our continued research and development efforts.

Research and development expenses were $12.4 million, $36.1
million and $92.7 million for the fiscal years ended January 31, 2013, 2014 and 2015, and $40.5 million and $69.9 million for the six months ended July 31, 2014 and 2015, respectively.

Manufacturing

Our contract
manufacturers, Avnet, Inc., or Avnet, and Hon Hai Precision Industry Co., Ltd., known as Foxconn, manufacture, assemble, test and package our products in accordance with our specifications. Our contract manufacturers generally procure the hardware
components for final assembly of our products. Most of the components are purchased from sources that we believe are readily available from other suppliers.

We provide our contract manufacturers a rolling forecast for anticipated orders, which our contract manufacturers use to build finished
products. The product mix and volumes are adjusted based on anticipated demand and actual sales and shipments in prior periods. Our contract manufacturers are generally able to respond to changes in our product mix or volume without significant
delay or increased costs. Our agreement with Avnet is terminable at any time by either party upon 90 days written notice and does not provide for any specific purchase volumes. Our agreement with Foxconn has a three-year term that is subject to
optional extensions absent notice of termination by either party. This agreement is terminable at any time by either party with 180-days prior notice. Our agreements with our contract manufacturers do not provide for any specific volume
purchase commitments and orders are placed on a purchase order basis. We work closely with our contract manufacturers to meet our product delivery requirements and to manage the manufacturing process and quality control.

Backlog

We typically accept and ship
orders within a short time frame. In general, customers may cancel or reschedule orders without penalty, and delivery schedules requested by customers in their purchase orders vary based upon each customers particular needs. As a
result, we do not believe that our backlog at any particular time is a reliable indicator of future revenue.

Competition

We operate in the intensely competitive data storage market that is characterized by constant change and innovation. Changes in the application
requirements, datacenter infrastructure trends and the broader technology landscape result in evolving customer requirements for capacity, performance scalability and enterprise features of storage systems. Our main competitors fall into two
categories:



large storage system vendors such as EMC, Hitachi Data Systems and NetApp that offer a broad range of storage systems targeting various use cases and end markets; and

large systems companies such as Dell, HP, Lenovo and IBM that have acquired or licensed specialist storage technology in recent years to complement their internally-developed storage offerings and have the technical and
financial resources to bring competitive products to market.

In addition, we compete against smaller specialized
storage companies, including next-generation vendors of hybrid storage as well as vendors of hyper-converged products, defined as server compute and storage combined within a single chassis. As our market grows, it will attract new startups, more
highly specialized vendors as well as larger vendors that may continue to acquire or bundle their products more effectively.

We believe
the principal competitive factors in the storage market are as follows:



Product features and enhancements, including ease of use, performance, reliability and scalability;



Product pricing and total cost of ownership;



Product interoperability with customer networks and backup software;



Global sales and distribution capability;



Ability to take advantage of improvements in industry standard components; and



Customer support and service.

We believe we generally compete favorably with our competitors
on the basis of these factors as a result of our hardware and software, product capabilities, ability to deliver the benefits of all-flash storage to a broad set of customers, management simplicity, ease of use and differentiated customer support.
However, many of our competitors have substantially greater financial, technical and other resources, greater name recognition, larger sales and marketing budgets, broader distribution and larger and more mature intellectual property portfolios.

As of July 31, 2015, we had over 200 total issued patents and over 150 patent applications in the United States and foreign countries.
Our issued patents have expiration dates ranging from 2015 to 2034. We also license technology from third parties when we believe it will facilitate our product offerings or business. We have adopted a policy under which we will not assert patents
acquired to date from third parties offensively, other than as part of a counterclaim.

We generally control access to and use of our
proprietary software and other confidential information through the use of internal and external controls, including contractual protections with employees, contractors, customers and partners. Unauthorized parties may still copy or otherwise obtain
and use our software and technology, despite our efforts to protect our trade secrets and proprietary rights through intellectual property rights, licenses and confidentiality agreements. We intend to expand our international operations, and
effective patent, copyright, trademark and trade secret protection may not be available or may be limited in foreign countries.

The data
storage industry is characterized by the existence of a large number of patents, trademarks, copyrights and other intellectual property rights, and by frequent litigation based on allegations of infringement or other violations of intellectual
property rights. From time to time, third parties, including our competitors and non-practicing entities, may claim that our products or technologies infringe their proprietary rights and may assert patent, copyright, trade secret and other
intellectual property rights against us and our customers, suppliers and channel partners. We are party to a number of agreements pursuant to which we are obligated to indemnify our customers, suppliers and channel partners against such claims. We
expect that infringement claims may increase as

the number of products and competitors in our market increase. In addition, to the extent that we gain greater visibility and market exposure as a public company, we face a higher risk of being
the subject of intellectual property infringement claims from third parties. See the section titled Risk Factors for additional information.

Facilities

Our corporate headquarters
are located in Mountain View, California. We also maintain offices in multiple locations in the United States and internationally in Europe, Asia, Australia, South America and Africa. We lease all of our facilities and do not own any real property.
We expect to add facilities as we grow our employee base and expand geographically. We believe that our facilities are adequate to meet our needs for the immediate future, and that, should it be needed, suitable additional space will be available to
accommodate expansion of our operations.

Employees

We believe the expertise of our people and our culture is a key enabler of our technology leadership. We had over 1,100 employees worldwide as
of July 31, 2015. None of our employees is represented by a labor organization or is a party to any collective bargaining arrangement.

Legal
Proceedings

On November 4, 2013, EMC filed a complaint against us in the United States District Court for the District of
Massachusetts, alleging that our hiring of EMC employees evidences a scheme to misappropriate EMCs confidential information and trade secrets and to unlawfully interfere with EMCs business relationships with its customers
and contractual relationships with its employees. The complaint seeks damages and injunctive relief. On November 26, 2013, we answered and counterclaimed, denying EMCs allegations and alleging that EMC surreptitiously
obtained and tested our product in a manner that constituted misappropriation of our trade secrets, a breach of contract, breach of the covenant of good faith and fair dealing, unlawful interference with our contractual and business relationships as
well as unfair competition and a violation of Massachusetts General Law 93A, Sections 2 and 11. On November 18, 2014, we amended our counterclaim, additionally alleging that EMC has engaged in commercial disparagement, violated the Lanham Act
and engaged in defamation. Our counterclaim seeks damages and declaratory and injunctive relief. Fact discovery has commenced and is currently scheduled to end on October 16, 2015. Expert discovery is scheduled to end on February 5, 2016, and
the deadline for filing dispositive motions is March 31, 2016. The district court has scheduled a trial date for October 17, 2016.

In a
separate litigation matter, on November 26, 2013, EMC filed a complaint against us in the United States District Court for the District of Delaware, alleging infringement of five patents held by EMC. The five patents are U.S. Patent 6,904,556
entitled Systems and Methods Which Utilize Parity Sets, U.S. Patent 6,915,475 entitled Data Integrity Management for Data Storage Systems, U.S. Patent 7,373,464 entitled Efficient Data Storage System and the
related U.S. Patent 7,434,015 entitled Efficient Data Storage System and U.S. Patent 8,375,187 entitled I/O Scheduling For Flash Drives. The complaint seeks damages and injunctive and equitable relief. On January 17,
2014, we filed a response to the complaint, denying all claims and asserting that EMCs patents are invalid. Fact discovery has been concluded, and expert discovery has ended. The deadline for filing dispositive motions is October 6, 2015.
Trial is currently scheduled for March 7, 2016.

In addition, we may, from time to time, be involved in various legal proceedings
arising from the normal course of business, and an unfavorable resolution of any of these matters could materially affect our future results of operations, cash flows or financial position.

In August 2015, we established the Pure Good Foundation as a non-profit organization, and in September 2015 we issued 700,000 shares of
our Class B common stock to this foundation. We anticipate that the proposed programs of the Pure Good Foundation will include grants, humanitarian relief, volunteerism and social development projects. We believe that the Pure Good Foundation
will foster employee morale, strengthen our community presence and provide increased brand visibility.

The
following table sets forth information regarding our executive officers and directors as of July 31, 2015:

Name

Age

Position

Executive Officers

Scott Dietzen

53

Chief Executive Officer and Director

John Coz Colgrove

52

Founder, Chief Technology Officer and Co-Chairman

David Hatfield

47

President

Timothy Riitters

42

Chief Financial Officer

Non-Employee Directors

Mike Speiser

44

Co-Chairman

Aneel Bhusri(2)

49

Director

Mark Garrett(1)

57

Director

Anita Sands(1)(3)

39

Director

Frank Slootman(2)

56

Director

Michelangelo Volpi(1)(3)

48

Director

(1)

Member of the Audit Committee.

(2)

Member of the Compensation Committee.

(3)

Member of the Nominating and Corporate Governance Committee.

Executive Officers

Scott Dietzen has served as our Chief Executive Officer and as a member of our board of directors since October
2010. From 2007 to 2009, Dr. Dietzen served in various roles at Yahoo! Inc., an internet technology company, including as interim Senior Vice President of Yahoo! Communications and Communities. From 2005 to 2007, Dr. Dietzen
served as President and Chief Technology Officer of Zimbra, Inc., a provider of open source messaging and collaboration software until its sale to Yahoo! in 2007. From 1998 to 2004, Dr. Dietzen served in various roles at BEA
Systems, Inc., including as BEA Systems Chief Technology Officer. He had served as Vice President, Marketing at WebLogic, Inc., a provider of web application servers, which BEA Systems acquired in 1998. Dr. Dietzen previously served
as Principal Technologist at Transarc Corporation, a filesystem software company, which was acquired by IBM. Dr. Dietzen currently serves on the board of directors of Cloudera, Inc. He earned a B.S. in Applied Mathematics and
Computer Science and a M.S. and Ph.D. in Computer Science from Carnegie Mellon University. We believe that Dr. Dietzen is qualified to serve as a member of our board of directors because of his deep technology background and his extensive
leadership experience across a range of technology companies.

John Coz Colgrove has served as our
Chief Technology Officer and as a member of our board of directors since founding Pure Storage in October 2009. Since May 2014, Mr. Colgrove has served as Co-Chairman of our board of directors. In 2009, Mr. Colgrove served as an
Entrepreneur in Residence at Sutter Hill Ventures, a venture capital firm. From 2005 to 2008, Mr. Colgrove served as a Fellow and Chief Technology Officer for the Datacenter Management Group of Symantec Corporation, an information security
firm. Mr. Colgrove was one of the founding engineers and a Fellow at Veritas Software Corp., a provider of storage management solutions, which merged with Symantec in 2005. Mr. Colgrove earned his B.S. in Computer Science from Rutgers
University and holds over 100 patents in the areas of computer system and data storage design. We believe that Mr. Colgrove is qualified to serve as a member of our board of directors because of his industry knowledge and his experience as
a founder of Pure Storage, as well as his leadership experience and deep technical expertise.

David Hatfield has served as our President since January 2013. From March
2007 to January 2013, Mr. Hatfield served as Senior Vice President of Worldwide Sales, Marketing, Products and Services and President of SaaS at Limelight Networks, Inc., a digital presence management software company, where he
was responsible for establishing their customer operations and global channel. From 2006 to 2007, Mr. Hatfield served as Vice President-General Manager of Professional Services for the Americas at Symantec and as Symantecs Vice President
of Sales from 2005 to 2006. From 2003 to 2005, Mr. Hatfield served as Vice President of Sales at Veritas Software. Mr. Hatfield earned a B.S. in Political Science from Santa Clara University.

Timothy Riitters has served as our Chief Financial Officer since August 2014. From January 2010 to August 2014, Mr. Riitters
served as Senior Director of Corporate Finance at Google, Inc., an internet technology company, where he was responsible for overseeing their annual planning and budget process. From 2007 to 2010, Mr. Riitters served as Director, EMEA Financial
Operations at Google, and from 2004 to 2007, as Finance Process Manager. From 2002 to 2004, Mr. Riitters served as a Senior Product Manager at Siebel Systems, Inc., a software company. Mr. Riitters previously worked at
Deloitte & Touche LLP, an accounting firm. Mr. Riitters is a certified public accountant (inactive) and earned a B.S. in Accounting from the University of Minnesota and an M.B.A. from Northwestern University.

Non-Employee Directors

Mike Speiser has served on our board of directors since October 2009 and as Co-Chairman of our board of directors since May 2014. Since
2008, Mr. Speiser has served as a Managing Director at Sutter Hill Ventures, a venture capital firm. From 2007 to 2008, Mr. Speiser served as Vice President of Community Products at Yahoo! Inc. From 2006 to 2007, Mr. Speiser served as
President and Chief Executive Officer of Bix, Inc., an internet company that Mr. Speiser founded. From 2005 to 2006, Mr. Speiser served as a technical advisor to Symantec. From 2001 to 2005, Mr. Speiser served as Vice President of
Product Management and Product Marketing at Veritas Software. Mr. Speiser earned a B.A. in Political Science from the University of Arizona and an M.B.A. from Harvard Business School. We believe that Mr. Speiser is qualified to serve as a
member of our board of directors because of his early and active involvement with Pure Storage and his extensive leadership and operational experience, as well as his perspective as a venture investor.

Aneel Bhusri has served on our board of directors since July 2010. Since 1999, Mr. Bhusri has served as a partner
at Greylock Partners, a venture capital firm. Since 2005, Mr. Bhusri has served as a member of the board of directors of Workday, Inc., an enterprise cloud application provider that he co-founded, as Co-Chief Executive Officer from
September 2009 to May 2014, as Chairman from January 2012 to May 2014 and as Chief Executive Officer since May 2014. From 1993 to 2004, Mr. Bhusri held a number of senior management positions with PeopleSoft, Inc., a human resource management
systems company, including Senior Vice President, Product Strategy, Marketing and Business Development and from 1999 to 2002 and in 2004, as Vice Chairman of the Board of Directors of PeopleSoft. Mr. Bhusri currently serves on the board of
directors of Intel Corporation. From 2002 to 2009, Mr. Bhusri was a member of the board of directors of Data Domain Corporation, where he held the position of Chairman from 2007 to 2009. Mr. Bhusri earned a B.S. in Electrical Engineering
and a B.A. in Economics from Brown University and an M.B.A. from Stanford University. Mr. Bhusri currently serves on the board of directors of a number of privately held companies. We believe that Mr. Bhusri is qualified to serve as a member of
our board of directors because of his extensive executive leadership and operational experience, including his service as an executive and director of multiple high growth technology companies.

Mark Garrett has served on our board of directors since July 2015. Since 2007, Mr. Garrett has served as Executive Vice President and
Chief Financial Officer of Adobe Systems Incorporated. From 2004 to 2007, Mr. Garrett served as Senior Vice President and Chief Financial Officer of the Software Group of EMC Corporation, an information technology company. From 2002 to 2004 and
from 1997 to 1999, Mr. Garrett served as Executive Vice President and Chief Financial Officer of Documentum, Inc., including throughout its acquisition by EMC in December 2003. Mr. Garrett currently serves on the board of directors of Model N, Inc.
From October 2008 to August 2015, Mr. Garrett served on the board of directors of Informatica Corporation.

Mr. Garrett earned a B.S. in accounting and marketing from Boston University and an M.B.A. from Marist College. We believe that Mr. Garrett is qualified to serve as a member of our board of
directors because of his extensive management and financial experience, as well as his relevant industry knowledge.

Anita Sands has served on our board of directors since July 2015. From April 2012 to September 2013, Dr. Sands served as
Group Managing Director and Head of Change Leadership and a member of the Wealth Management Americas Executive Committee of UBS Financial Services, a global financial services firm. From April 2010 to April 2012, Dr. Sands served as Group
Managing Director and Chief Operating Officer of Wealth Management Americas at UBS Financial Services. From October 2009 to April 2010, Dr. Sands served as Transformation Consultant at UBS Financial Services. From 2008 to 2009, Dr. Sands
served as Managing Director, Head of Transformation Management at Citigroups Global Operations and Technology organization. Prior to that, Dr. Sands also held several leadership positions with RBC Financial Group and CIBC. Dr. Sands
currently serves on the board of directors of Symantec Corporation, ServiceNow, Inc. and a non-profit organization. Dr. Sands earned a B.S. in Physics and Applied Mathematics from The Queens University of Belfast, Northern Ireland, a Ph.D. in
Atomic and Molecular Physics from The Queens University of Belfast, Northern Ireland and a M.S. in Public Policy and Management from Carnegie Mellon University. We believe that Dr. Sands is qualified to serve as a member of our board of
directors because of her extensive leadership and operational experience at global financial services firms, as well as her service as a director of multiple large technology companies.

Frank Slootman has served on our board of directors since May 2014. Since May 2011, Mr. Slootman has served as President and Chief
Executive Officer, and as a member of the board of directors, of ServiceNow, Inc., an enterprise IT cloud company. From January 2011 to April 2011, Mr. Slootman served as a Partner with Greylock Partners, a venture capital firm. From 2011 to
2012, Mr. Slootman served as an advisor to EMC Corporation. From 2009 to 2011, Mr. Slootman served as President of the Backup Recovery Systems Division at EMC. From 2003 to 2009, Mr. Slootman served as President and Chief Executive
Officer of Data Domain Corporation, an information technology company, which was acquired by EMC in 2009. Since August 2011, Mr. Slootman has served as a member of the board of directors of Imperva, Inc. Mr. Slootman earned undergraduate
and graduate degrees in Economics from the Netherlands School of Economics, Erasmus University Rotterdam. We believe that Mr. Slootman is qualified to serve as a member of our board of directors because of his extensive executive
leadership and operational experience, as well as his relevant industry knowledge.

Michelangelo Volpi has served on our board
of directors since April 2014. Since July 2009, Mr. Volpi has served as a partner at Index Ventures, a venture capital firm. From 2007 to 2009, Mr. Volpi served as Chief Executive Officer for Joost Inc., an internet video services company.
From 1994 to 2007, Mr. Volpi served in various executive roles at Cisco Systems, Inc., a technology company, including Chief Strategy Officer and Senior Vice President and General Manager, Routing and Service Provider Group. Mr. Volpi
currently serves on the board of directors of Hortonworks, Inc., Exor S.p.A. and a number of privately held companies. From April 2010 to April 2013, Mr. Volpi served on the board of directors of Telefonaktiebolaget L.M. Ericsson.
Mr. Volpi earned a B.S. in Mechanical Engineering, an M.S. in Manufacturing Systems Engineering and an M.B.A. from Stanford University. We believe that Mr. Volpi is qualified to serve as a member of our board of directors because of
his leadership experience, expertise as a venture capital investor and knowledge regarding the technology industry.

Family Relationships

There are no family relationships among any of the directors or executive officers.

Board Composition

Certain members of our
board of directors were elected pursuant to the provisions of a voting agreement. Under the terms of this voting agreement, the stockholders who are party to the voting agreement have agreed to vote their respective shares so as to elect:
(1) one director designated by Sutter Hill Ventures, currently Mr. Speiser; (2) one director designated by Greylock XIII Limited Partnership, currently Mr. Bhusri; (3) one

director designated by Redpoint Ventures IV, L.P., currently not designated; (4) one director designated by Index Ventures VI (Jersey), L.P., currently Mr. Volpi; and (5) one
director designated by the holders of a majority of shares held by key holders providing services to us, currently Mr. Colgrove. The holders of a majority of our preferred stock and common stock, voting together as a single class, further
designated Dr. Dietzen and Mr. Slootman for election to our board of directors. The voting agreement will terminate upon the closing of this offering and none of our stockholders will have any special rights regarding the election or
designation of members of our board of directors. There is no contractual arrangement by which Mr. Garrett and Dr. Sands were appointed to our board of directors.

Our board of directors will consist of eight members upon the closing of this offering. In accordance with the amended and restated
certificate of incorporation to be filed in connection with this offering, immediately after this offering, our board of directors will be divided into three classes. At each annual general meeting of stockholders, the successors to directors whose
terms then expire will be elected to serve from the time of election and qualification until the third annual meeting following the election. Our directors will be divided among the three classes as follows:



The Class I directors will be Mr. Colgrove and Dr. Dietzen, and their terms will expire at the annual meeting of stockholders to be held in 2016;



The Class II directors will be Messrs. Garrett, Slootman and Speiser, and their terms will expire at the annual meeting of stockholders to be held in 2017; and



The Class III directors will be Dr. Sands and Messrs. Bhusri and Volpi, and their terms will expire at the annual meeting of stockholders to be held in 2018.

We expect that any additional directorships resulting from an increase in the number of directors will be distributed among the three classes
so that, as nearly as possible, each class will consist of one-third of the directors. The division of our board of directors into three classes with staggered three-year terms may delay or prevent a change of our management or a change in control.

Director Independence

Under the
listing requirements and rules of the NYSE, independent directors must comprise a majority of our board of directors as a listed company within one year of the closing of this offering.

Our board of directors has undertaken a review of its composition, the composition of its committees and the independence of each director.
Based upon information requested from and provided by each director concerning his background, employment and affiliations, including family relationships, our board of directors has determined that Dr. Sands and Messrs. Bhusri, Garrett,
Slootman and Volpi do not have any relationships that would interfere with the exercise of independent judgment in carrying out the responsibilities of a director and that each of these directors is independent as that term is defined
under the applicable rules and regulations of the SEC and the listing requirements and rules of the NYSE. Dr. Dietzen is not independent due to his position as our Chief Executive Officer, Mr. Colgrove is not independent due to his
position as our Chief Technology Officer, and Mr. Speiser is not independent due to his stock option grant in exchange for his interim oversight of a portion of our research and development team from April 2013 to November 2013. Accordingly, a
majority of our directors are independent, as required under applicable NYSE rules. In making this determination, our board of directors considered the current and prior relationships that each non-employee director has with our company and all
other facts and circumstances our board of directors deemed relevant in determining their independence, including their beneficial ownership of our capital stock, and with respect to Mr. Bhusri, his position as the Chief Executive Officer of
Workday, Inc., Mr. Slootman, his position as President and Chief Executive Officer of ServiceNow, Inc. and Mr. Garrett, his position as the Chief Financial Officer of Adobe Systems Incorporated. In the ordinary course of business, each of Workday,
Inc., ServiceNow, Inc. and Adobe Systems Incorporated, have purchased our products and related services, and we have purchased products and related services from Workday, Inc., ServiceNow, Inc. and Adobe Systems Incorporated.

Our board of directors has established an audit committee, a compensation committee and a nominating and corporate governance committee. Our
board of directors may establish other committees to facilitate the management of our business. The composition and functions of each committee are described below. Members serve on these committees until their resignation or until otherwise
determined by our board of directors.

Audit Committee

Our audit committee consists of Dr. Sands and Messrs. Volpi and Garrett. Our board of directors has determined that Dr. Sands
and Messrs. Volpi and Garrett are independent under NYSE listing standards and Rule 10A-3(b)(1) of the Exchange Act. The chair of our audit committee is Mr. Garrett. Our board of directors has determined
that Mr. Garrett is an audit committee financial expert within the meaning of SEC regulations. Our board of directors has also determined that each member of our audit committee can read and understand fundamental financial statements in
accordance with applicable requirements. In arriving at these determinations, the board of directors has examined each audit committee members scope of experience and the nature of their employment in the corporate finance sector.

The primary purpose of the audit committee is to discharge the responsibilities of our board of directors with respect to our accounting,
financial and other reporting and internal control practices and to oversee our independent registered accounting firm. Specific responsibilities of our audit committee include:



selecting a qualified firm to serve as the independent registered public accounting firm to audit our financial statements;



helping to ensure the independence and performance of the independent registered public accounting firm;



discussing the scope and results of the audit with the independent registered public accounting firm, and reviewing, with management and the independent accountants, our interim and year-end operating results;

obtaining and reviewing a report by the independent registered public accounting firm at least annually, that describes our internal quality control procedures, any material issues with such procedures, and any steps
taken to deal with such issues when required by applicable law; and



approving (or, as permitted, pre-approving) all audit and all permissible non-audit services, other than de minimis non-audit services, to be performed by the independent registered public accounting firm.

Compensation Committee

Our compensation committee consists of Messrs. Bhusri and Slootman. Our board of directors has determined that Messrs. Bhusri and Slootman are
independent under NYSE listing standards, are non-employee directors as defined in Rule 16b-3 promulgated under the Exchange Act and are outside directors as that term is defined in Section 162(m) of the Code. The
chair of our compensation committee is Mr. Bhusri.

The primary purpose of our compensation committee is to discharge the
responsibilities of our board of directors to oversee our compensation policies, plans and programs and to review and determine the compensation to be paid to our executive officers, directors and other senior management, as appropriate. Specific
responsibilities of our compensation committee include:



reviewing and approving, or recommending that our board of directors approve, the compensation of our executive officers;

reviewing and recommending to our board of directors the compensation of our directors;



reviewing and approving, or recommending that our board of directors approve, the terms of compensatory arrangements with our executive officers;



administering our stock and equity incentive plans;



selecting independent compensation consultants and assessing whether there are any conflicts of interest with any of the committees compensation advisers;



reviewing and approving, or recommending that our board of directors approve, incentive compensation and equity plans, severance agreements, change-of-control protections and any other compensatory arrangements for our
executive officers and other senior management, as appropriate; and



reviewing and establishing general policies relating to compensation and benefits of our employees and reviewing our overall compensation philosophy.

Nominating and Corporate Governance Committee

Our nominating and corporate governance committee consists of Dr. Sands and Mr. Volpi. The chair of our nominating and corporate
governance committee is Dr. Sands. Each member of the nominating and corporate governance committee is independent within the meaning of applicable listing standards, is a non-employee director and is free from any relationship that would
interfere with the exercise of his or her independent judgment, as determined by the board of directors in accordance with the applicable NYSE listing standards.

identifying, evaluating and selecting, or recommending that our board of directors approve, nominees for election to our board of directors;



evaluating the performance of our board of directors and of individual directors;



considering and making recommendations to our board of directors regarding the composition of the committees of the board of directors;



reviewing developments in corporate governance practices;



evaluating the adequacy of our corporate governance practices and reporting;



reviewing management succession plans;



developing and making recommendations to our board of directors regarding corporate governance guidelines and matters; and



overseeing an annual evaluation of the board of directors performance.

Code of Conduct

We have adopted a code of conduct that applies to all of our employees, officers, including our principal executive officer, principal
financial officer and principal accounting officer or controller, or persons performing similar functions and agents and representatives, including directors and consultants. The full text of our code of conduct will be posted on our website at
www.purestorage.com. We intend to disclose future amendments to certain provisions of our code of conduct, or waivers of such provisions applicable to any principal executive officer, principal financial officer, principal accounting officer or
controller, or persons performing similar functions, and our directors, on our website identified above.

None of the members of the compensation committee is currently, or has been at any time, one of our officers or employees. None of our
executive officers currently serves, or has served during the last year, as a member of the board of directors or compensation committee of any entity that has one or more executive officers serving as a member of our board of directors or
compensation committee.

Non-Employee Director Compensation

The following table sets forth information concerning the compensation paid to our non-employee directors during the fiscal year ended
January 31, 2015.

Name

Option Awards(1)

Aneel Bhusri

$



Satish Dharmaraj(2)



Mark Garrett(3)



Anita Sands(4)



Frank Slootman(5)

856,698

(6)

Mike Speiser(7)



Michelangelo Volpi



(1)

The amount shown in this column does not reflect dollar amount actually received by the director. Instead, this amount reflects the aggregate grant date fair value of this stock option granted in the fiscal year ended
January 31, 2015, computed in accordance with the provisions of FASB ASC Topic 718. Assumptions used in the calculation of this amount are included in Note 9 to our consolidated financial statements included in this prospectus. As required
by SEC rules, the amount shown excludes the impact of estimated forfeitures related to service-based vesting conditions. Our director will only realize compensation to the extent the trading price of our common stock is greater than the exercise
price of this stock option.

(2)

Mr. Dharmaraj resigned from our board of directors in July 2015.

(3)

Mr. Garrett joined our board of directors in July 2015. In July 2015, we granted Mr. Garrett an option to purchase 300,000 shares of our Class B common stock with an exercise price of $18.16 per share.
The shares vest monthly over six years, with 5,000 of the shares vesting monthly over the first three years and 3,333 of the shares vesting monthly over the subsequent three years, subject to continued service on our board of directors through each
relevant vesting date.

(4)

Dr. Sands joined our board of directors in July 2015. In July 2015, we granted Dr. Sands an option to purchase 300,000 shares of our Class B common stock with an exercise price of $18.16 per share. The shares
vest monthly over six years, with 5,000 of the shares vesting monthly over the first three years and 3,333 of the shares vesting monthly over the subsequent three years, subject to continued service on our board of directors through each relevant
vesting date.

(5)

Mr. Slootman joined our board of directors in May 2014.

(6)

Represents an option to purchase 160,000 shares of our Class B common stock with an exercise price of $8.46 per share, which vests monthly over two years. In April 2013, we granted Mr. Slootman an
option to purchase 360,000 shares of our Class B common stock with an exercise price of $1.50 per share, which vests monthly over three years, subject to continued service on our board of directors through each relevant vesting date.

(7)

In June 2013, we granted Mr. Speiser an option to purchase 1,444,820 shares of our Class B common stock with an exercise price of $1.50 per share in exchange for his interim oversight of a portion of our
research and development team from April 2013 to November 2013. The shares subject to this option vest upon the occurrence of a performance based milestone tied to bookings of products developed by this team. In June 2013, Mr. Speiser early
exercised this option and transferred the shares to Sutter Hill Ventures and certain general partners of Sutter Hill Ventures in accordance with the terms of his employment. The shares of Class B common stock issued upon exercise of the option
remain subject to a right of repurchase in favor of us.

Dr. Sands and Messrs. Garrett and Slootman are the only
non-employee directors who currently hold options to purchase shares of Class B common stock. We currently reimburse our directors for their reasonable out-of-pocket expenses in connection with attending board of directors and committee meetings.
From time to time, we have granted stock options to certain of our non-employee directors as compensation for their services.

Non-Employee Director
Compensation Policy

We intend to adopt a non-employee director compensation policy following the closing of this offering and on terms
to be determined at a later date by our board of directors, pursuant to which our non-employee directors will be eligible to receive compensation for service on our board of directors and committees of our board of directors.

Our named executive officers, consisting of our principal executive officer and the next two most highly compensated executive officers as of
January 31, 2015, were:



Scott Dietzen, Chief Executive Officer;



David Hatfield, President; and



Timothy Riitters, Chief Financial Officer.

Fiscal 2015 Summary Compensation Table

The following table presents all of the compensation awarded to or earned by our named executive officers during the fiscal year ended
January 31, 2015.

Name and Principal Position

Year

Salary

OptionAwards(1)

NonequityIncentive PlanCompensation

All OtherCompensation

Total

Scott Dietzen

2015

$

250,000

$

3,189,524

$

111,864

(2)

$

1,404,388

(3)

$

4,955,776

Chief Executive Officer

David Hatfield

2015

300,000

2,657,937

425,332

(4)

7,274,645

(5)

10,657,914

President

Timothy Riitters

2015

108,333

(6)

8,965,770

60,411

(2)

2,385

(7)

9,136,899

Chief Financial Officer

(1)

The amount shown in this column does not reflect dollar amount actually received by our named executive officers. Instead, this amount reflects the aggregate grant date fair value of this stock option granted in the
fiscal year ended January 31, 2015, computed in accordance with the provisions of FASB ASC Topic 718. Assumptions used in the calculation of this amount are included in Note 9 to our consolidated financial statements included in this
prospectus. As required by SEC rules, the amount shown excludes the impact of estimated forfeitures related to service-based vesting conditions. Our named executive officers will only realize compensation to the extent the trading price of our
common stock is greater than the exercise price of such stock options.

(2)

Represents quarterly bonuses earned by Dr. Dietzen and Mr. Riitters under our incentive compensation plan for officers for the fiscal year ended January 31, 2015. The amounts reported represent
performance-based cash incentives earned by each named executive officer based on the achievement of certain company and individual and departmental management goals and the individuals target incentive compensation amount. Incentive
compensation awards are paid quarterly, based on the achievement of the objectives agreed to at the beginning of each quarter.

(3)

Includes (i) $1,395,423 of shares sold by Dr. Dietzen in our July 2014 tender offer, which is the difference between the purchase price per share of $15.7259 paid by us and $8.46 per share, the fair market
value of the shares as of the date of repurchase; (ii) $4,500 in employer contributions to Dr. Dietzens health savings account; (iii) $3,832 in travel expenses associated with Dr. Dietzens spouse attending a
company-sponsored event; and (iv) $633 in life insurance premiums.

(4)

Represents sales commissions earned by Mr. Hatfield during the fiscal year ended January 31, 2015.

(5)

Includes (i) $7,265,900 of shares sold by Mr. Hatfield in our July 2014 tender offer, which is the difference between the purchase price per share of $15.7259 paid by us and $8.46 per share, the fair market
value of the shares as of the date of repurchase; (ii) $4,500 in employer contributions to Mr. Hatfields health savings account; (iii) $3,832 in travel expenses associated with Mr. Hatfields spouse attending a
company-sponsored event; and (iv) $413 in life insurance premiums.

(6)

Mr. Riitters commenced his employment with us in August 2014.

(7)

Includes (i) $2,250 in employer contributions to Mr. Riitters health savings account and (ii) $135 in life insurance premiums.

The following table presents information regarding outstanding equity awards held by our named executive officers as of January 31, 2015.
All awards were granted under our 2009 Equity Incentive Plan.

Option Awards

Name

Grant Date

VestingCommencementDate

Number of SecuritiesUnderlying UnexercisedOptions Exercisable (#)

Number ofSecuritiesUnderlyingUnexercisedOptionsUnexercisable (#)

OptionExercisePrice

OptionExpirationDate

Scott Dietzen

01/30/2014

03/20/2017



300,000

(1)(2)

$

2.5750

01/29/2024

03/28/2014

04/01/2018



600,000

(2)(3)

2.9800

03/27/2024

David Hatfield

02/06/2013

01/15/2013

1,052,112

(2)(4)



1.2250

02/05/2023

01/30/2014

07/15/2016



400,000

(2)(5)

2.5750

01/29/2024

03/28/2014

01/01/2018



500,000

(2)(3)

2.9800

03/27/2024

Timothy Riitters

10/08/2014

08/26/2014



1,050,000

(2)(6)

9.6500

10/07/2024

10/08/2014

08/26/2018



350,000

(2)(3)

9.6500

10/07/2024

(1)

1/12th of the total shares subject to this option grant will vest monthly measured from the vesting commencement date, subject to executive officers continued
service. No shares were vested as of January 31, 2015.

(2)

The unvested shares subject to this option are subject to accelerated vesting upon a qualifying termination, as described in the section titled Employment, Severance and Change in Control Agreements.

(3)

1/24th of the total shares subject to this option grant will vest monthly measured from the vesting commencement date, subject to executive officers continued
service. No shares were vested as of January 31, 2015.

(4)

1/48th of the total shares subject to this option will vest monthly measured from the vesting commencement date, subject to executive officers continued
service. No shares were vested as of January 31, 2015. The shares subject to this option are early exercisable by Mr. Hatfield, subject to our right to repurchase unvested shares in the event Mr. Hatfields employment terminates.

(5)

1/18th of the total shares subject to this option grant will vest monthly measured from the vesting commencement date, subject to executive officers continued
service. No shares were vested as of January 31, 2015.

(6)

1/4th of the total shares subject to this option grant will vest one year after the vesting commencement date;
1/48th of the total shares subject to this option grant will vest monthly thereafter over the following three years, subject to executive officers continued service. No shares were vested as
of January 31, 2015.

Emerging Growth Company Status

We are an emerging growth company, as defined in the JOBS Act. As an emerging growth company we will be exempt from certain
requirements related to executive compensation, including, but not limited to, the requirements to hold a nonbinding advisory vote on executive compensation and to provide information relating to the ratio of total compensation of our Chief
Executive Officer to the median of the annual total compensation of all of our employees, each as required by the Investor Protection and Securities Reform Act of 2010, which is part of the Dodd-Frank Wall Street Reform and Consumer Protection Act.

Pension Benefits

Our named
executive officers did not participate in, or otherwise receive any benefits under, any pension or retirement plan sponsored by Pure during the fiscal year ended January 31, 2015.

Nonqualified Deferred Compensation

Our
named executive officers did not participate in, or earn any benefits under, a non-qualified deferred compensation plan sponsored by Pure during the fiscal year ended January 31, 2015.

Employment, Severance and Change in Control Agreements

Offer Letters

We have offer letters with each of our executive officers other than Mr. Colgrove. The offer letters generally provide for at-will
employment and set forth the executive officers initial base salary, initial equity grant

amount, eligibility for employee benefits and in some cases severance benefits upon a qualifying termination of employment. In addition, each of our named executive officers has executed of our
standard proprietary information and inventions agreement. The key terms of employment with our executive officers are described below.

Scott Dietzen

In
September 2010, we entered into an offer letter agreement with Scott Dietzen, our Chief Executive Officer. Dr. Dietzens annual base salary as of January 31, 2015 was $250,000. Under the terms of his offer letter, Dr. Dietzen was
granted an option to purchase 6,344,208 shares of Class B common stock with an exercise price of $0.1350 per share vesting monthly over 48 months from September 2010. In June 2012, Dr. Dietzen was granted an option to purchase 1,153,926
shares of Class B common stock with an exercise price of $0.49 per share vesting monthly over 30 months from September 2014. In January 2014, Dr. Dietzen was granted an option to purchase 300,000 shares of Class B common stock with an exercise
price of $2.575 per share vesting monthly over 12 months from March 2017. In March 2014, Dr. Dietzen was granted an option to purchase 600,000 shares of Class B common stock with an exercise price of $2.98 per share vesting monthly over 24
months from April 2018. In September 2015, Dr. Dietzen was granted an option to purchase 83,333 shares of Class B common stock with an exercise price of $17.00 per share vesting monthly over 12 months from January 2020. In September 2015,
Dr. Dietzen was granted an option to purchase 125,000 shares of Class B common stock with an exercise price of $17.00 per share vesting monthly over 12 months from January 2021. Dr. Dietzen is eligible to earn a bonus with an annual
target of $100,000 paid in quarterly installments based on the achievement of certain Company and individual goals.

If
Dr. Dietzens employment is terminated without cause or he terminates his employment for good reason, on or within 12 months following a change in control, all outstanding shares subject to his outstanding equity awards shall vest in full
as of his termination date. Dr. Dietzen must sign a release of claims agreement as a pre-condition of receiving this termination benefit.

David Hatfield

In
November 2012, we entered into an offer letter agreement with David Hatfield, our President. Mr. Hatfields annual base salary as of January 31, 2015 was $300,000 and we paid him a signing and retention bonus of $250,000. Under the
terms of his offer letter, Mr. Hatfield was granted (i) an option to purchase 3,347,054 shares of Class B common stock with an exercise price of $1.225 per share vesting monthly over 48 months from January 2013, (ii) an option to
purchase 334,704 shares of Class B common stock with an exercise price of $1.225 vesting upon the achievement of certain milestones during the fiscal year ended January 31, 2014, which milestones the board determined were met, and (iii) an
option to purchase 334,704 shares of Class B common stock with an exercise price of $1.225 vesting upon the achievement of certain milestones during the fiscal year ended January 31, 2015, which milestones the board determined were met. In
January 2014, Mr. Hatfield was granted an option to purchase 400,000 shares of Class B common stock with an exercise price of $2.575 per share vesting monthly over 18 months from July 2016. In March 2014, Mr. Hatfield was granted an option
to purchase 500,000 shares of Class B common stock with an exercise price of $2.98 per share vesting monthly over 24 months from January 2018. In March 2015, Mr. Hatfield was granted an option to purchase 150,000 shares of Class B common stock
with an exercise price of $13.20 per share vesting monthly over 12 months from February 2020. In September 2015, Mr. Hatfield was granted an option to purchase 75,000 shares of Class B common stock with an exercise price of $17.00 per
share vesting monthly over 10 months from March 2021. Mr. Hatfield is entitled to earn sales commissions based on his and our performance against annual targets with quarterly objectives, with a target commission of $300,000.

Pursuant to the terms of his offer letter, if Mr. Hatfields employment is terminated without cause or he terminates his employment
for good reason, and other than as result of his death or disability, he will be eligible to receive certain severance benefits, the conditions of which vary depending on whether such termination occurs

in connection with a change in control. If termination of employment occurs absent a change in control, Mr. Hatfield will be eligible to receive continuation of his base salary and
reimbursement of COBRA payments for a period of nine months and vesting of 25% of the then-unvested shares subject to any then-outstanding stock options. If termination of employment occurs on or within 18 months following a change in control,
Mr. Hatfield will be eligible to receive the salary and COBRA payments as described in the preceding sentence and vesting of all of the then-unvested shares subject to any then outstanding stock options. Mr. Hatfield must sign a release of
claims agreement as a pre-condition of receiving these termination benefits.

Timothy Riitters

In August 2014, we entered into an offer letter agreement with Timothy Riitters, our Chief Financial Officer. Mr. Riitters annual
base salary as of January 31, 2015 was $250,000. Under the terms of his offer letter, Mr. Riitters was granted an option to purchase 1,050,000 shares of Class B common stock with an exercise price of $9.65 per share with 25% of the shares
vesting in August 2015 and the remainder vesting monthly over 36 months from August 2015, and an option to purchase 350,000 shares of Class B common stock with an exercise price of $9.65 per share vesting monthly over 24 months from
August 2018. In March 2015, Mr. Riitters was granted an option to purchase 75,000 shares of Class B common stock with an exercise price of $13.20 per share vesting monthly over 12 months from September 2020. In September 2015, Mr. Riitters
was granted an option to purchase 27,500 shares of Class B common stock with an exercise price of $17.00 per share vesting monthly over 12 months from January 2020. In September 2015, Mr. Riitters was granted an option to purchase 32,500 shares
of Class B common stock with an exercise price of $17.00 per share vesting monthly over 12 months from January 2021. Mr. Riitters is eligible to earn a bonus with an annual target of $125,000, paid in quarterly installments, based on our
achievement of our global bookings target for that quarter, as determined by our Chief Executive Officer.

Pursuant to the terms of
his offer letter, if Mr. Riitters employment is terminated without cause or if he terminates his employment for good reason, and other than as result of his death or disability, he will be eligible to receive certain severance benefits,
the conditions of which vary depending on whether such termination occurs in connection with a change in control. If termination of employment occurs absent a change in control, Mr. Riitters will be eligible to receive continuation of his base
salary and reimbursement of COBRA payments for a period of nine months and he will continue to vest in his option for six months after the date of such termination. If termination of employment occurs on or within 12 months following a change in
control, Mr. Riitters will be eligible to receive the salary and COBRA payments as described in the preceding sentence and vesting of all of the then-unvested shares subject to any then outstanding stock options. Mr. Riitters must sign a
release of claims agreement as a pre-condition of receiving these termination benefits.

John Colgrove

If Mr. Colgroves employment is terminated without cause or he terminates his employment for good reason on or within 18 months
following a change in control, all unvested shares of stock subject to his outstanding equity awards shall immediately become fully vested. In connection with the formation of our Company, in June 2012, Mr. Colgrove was granted an option to
purchase 1,153,926 shares of Class B common stock with an exercise price of $0.49 per share vesting monthly over 30 months from October 2013. In January 2014, Mr. Colgrove was granted an option to purchase 600,000 shares of Class B common stock
with an exercise price of $2.575 per share vesting monthly over 24 months from April 2016. In March 2014, Mr. Colgrove was granted an option to purchase 600,000 shares of Class B common stock with an exercise price of $2.98 per share vesting
monthly over 24 months from April 2018. In September 2015, Mr. Colgrove was granted an option to purchase 83,333 shares of Class B common stock with an exercise price of $17.00 per share vesting monthly over 12 months from January 2020. In
September 2015, Mr. Colgrove was granted an option to purchase 125,000 shares of Class B common stock with an exercise price of $17.00 per share vesting monthly over 12 months from January 2021. Mr. Colgrove is eligible to earn a bonus
with an annual target of $100,000 paid in quarterly installments based on the achievement of certain Company and individual goals.

In September 2015, we adopted a Change in Control Severance Benefit Plan, or the Severance Plan. Employees with the title of
vice president or above, including each of our executive officers, are eligible participants under the Severance Plan. Under the Severance Plan, each eligible participant who suffers an involuntary termination within the period starting three months
prior to a change in control and ending on the 12-month anniversary of the change in control, will receive (1) a lump sum cash payment equal to six months of the participants then-current base
salary, (2) a lump sum cash payment equal to six months of the participants then-current annual target bonus, (3) up to six months of company-paid health insurance coverage and (4) accelerated vesting of 100% of the shares
subject to each time-based vesting equity award held by such participant. These benefits are subject to a best after tax provision in the case the benefits would trigger excise tax penalties and loss of deductibility under Code
Sections 280G and 4999. If an employee is an eligible participant and otherwise eligible to receive severance benefits under the Severance Plan that are of the same category and would otherwise duplicate the benefits available under the terms
of any other agreement the participant has with us, the participant will receive severance benefits under such other agreement in lieu of any Severance Plan benefits to the extent such benefits are duplicative, and severance benefits will be
provided under the Severance Plan only to the extent, if any, that Severance Plan benefits are not duplicative benefits.

Employee Benefit Plans

We believe that our ability to grant equity-based awards is a valuable and necessary compensation tool that aligns the long-term
financial interests of our employees, consultants and directors with the financial interests of our stockholders. In addition, we believe that our ability to grant options and other equity-based awards helps us to attract, retain and motivate
employees, consultants and directors and encourages them to devote their best efforts to our business and financial success. The principal features of our equity incentive plans and our 401(k) plan are summarized below. These summaries are qualified
in their entirety by reference to the actual text of the plans, which, other than the 401(k) plan, are filed as exhibits to the registration statement of which this prospectus is a part.

Authorized Shares.
The maximum number of shares of our Class A common stock that may be issued under our 2015 Plan is 27,000,000. In addition, the number of shares of our Class A common stock reserved for issuance under our 2015 Plan will automatically
increase on February 1st of each calendar year, from February 1, 2016 through February 1, 2025, in an amount equal to 5% of the total number of shares of our capital stock outstanding on the last day of the calendar month prior to the date of
each automatic increase, or a lesser number of shares determined by our board of directors. The maximum number of shares of our Class A common stock that may be issued upon the exercise of incentive stock options under our 2015 Plan is
135,000,000.

Shares subject to stock awards granted under our 2015 Plan that expire or terminate without being exercised in full, or that
are paid out in cash rather than in shares, do not reduce the number of shares available for issuance under our 2015 Plan. Additionally, shares issued pursuant to stock awards under our 2015 Plan that we repurchase or that are forfeited, as well as
shares used to pay the exercise price of a stock award or to satisfy the tax withholding obligations related to a stock award, become available for future grant under our 2015 Plan.

Plan Administration. Our board of directors, or a duly authorized committee of our board
of directors, will administer our 2015 Plan. Our board of directors may also delegate to one or more of our officers the authority to (1) designate employees (other than officers) to receive specified stock awards and (2) determine the
number of shares subject to such stock awards. Under the 2015 Plan, our board of directors has the authority to determine the terms of awards, including recipients, the exercise, purchase or strike price of stock awards, if any, the number of shares
subject to each stock award, the fair market value of a share of our Class A common stock, the vesting schedule applicable to the awards, together with any vesting acceleration, the form of consideration, if any, payable upon exercise or
settlement of the award and the terms of the award agreements.

Section 162(m) Limits. At such time as necessary for
compliance with Section 162(m) of the Code, no participant may be granted stock awards covering more than 3,000,000 shares (6,000,000 shares in the year of hire) of our common stock under the 2015 Plan during any calendar year pursuant to stock
options, stock appreciation rights and other stock awards whose value is determined by reference to an increase over an exercise price or strike price of at least 100% of the fair market value of our common stock on the date of grant. Additionally,
no participant may be granted in a calendar year a performance stock award covering more than 3,000,000 shares (6,000,000 shares in the year of hire) of our Class A common stock or a performance cash award having a maximum value in excess of
$5,000,000 under our 2015 Plan. The limitations are designed to allow us to grant compensation that will not be subject to the $1,000,000 annual limitation on the income tax deductibility of compensation paid to a covered executive officer imposed
by Section 162(m) of the Code.

Stock Options. Incentive stock options and nonstatutory stock options are granted pursuant to
stock option agreements adopted by the plan administrator. The plan administrator determines the exercise price for stock options, within the terms and conditions of the 2015 Plan, provided that the exercise price of a stock option generally cannot
be less than 100% of the fair market value of our common stock on the date of grant. Options granted under the 2015 Plan vest at the rate specified in the stock option agreement as determined by the plan administrator.

Restricted Stock Unit Awards. Restricted stock unit awards are granted pursuant to restricted stock unit award agreements adopted by
the plan administrator. Restricted stock unit awards may be granted in consideration for any form of legal consideration that may be acceptable to our board of directors and permissible under applicable law. A restricted stock unit award may be
settled by cash, delivery of stock, a combination of cash and stock as deemed appropriate by the plan administrator or in any other form of consideration set forth in the restricted stock unit award agreement. Additionally, dividend equivalents may
be credited in respect of shares covered by a restricted stock unit award. Except as otherwise provided in the applicable award agreement, restricted stock units that have not vested will be forfeited upon the participants cessation of
continuous service for any reason.

Restricted Stock Awards. Restricted stock awards are granted pursuant to restricted stock award
agreements adopted by the plan administrator. A restricted stock award may be awarded in consideration for cash, check, bank draft or money order, past services to us or any other form of legal consideration that may be acceptable to our board of
directors and permissible under applicable law. The plan administrator determines the terms and conditions of restricted stock awards, including vesting and forfeiture terms. If a participants service relationship with us ceases for any
reason, we may receive through a forfeiture condition or a repurchase right any or all of the shares of Class A common stock held by the participant that have not vested as of the date the participant terminates service with us.

Stock Appreciation Rights. Stock appreciation rights are granted pursuant to stock appreciation grant agreements adopted by the plan
administrator. The plan administrator determines the purchase price or strike price for a stock appreciation right, which generally cannot be less than 100% of the fair market value of our common stock on the date of grant. A stock appreciation
right granted under the 2015 Plan vests at the rate specified in the stock appreciation right agreement as determined by the plan administrator.

Performance Awards. The 2015 Plan permits the grant of performance-based stock and cash
awards that may qualify as performance-based compensation that is not subject to the $1,000,000 limitation on the income tax deductibility imposed by Section 162(m) of the Code. Our compensation committee may structure awards so that the stock
or cash will be issued or paid only following the achievement of certain pre-established performance goals during a designated performance period.

Other Stock Awards. The plan administrator may grant other awards based in whole or in part by reference to our Class A common
stock. The plan administrator will set the number of shares under the stock award and all other terms and conditions of such awards.

Changes to Capital Structure. In the event there is a specified type of change in our capital structure, such as a stock split, reverse
stock split or recapitalization, appropriate adjustments will be made to (1) the class and maximum number of shares reserved for issuance under the 2015 Plan, (2) the class and maximum number of shares by which the share reserve may
increase automatically each year, (3) the class and maximum number of shares that may be issued upon the exercise of incentive stock options, (4) the class and maximum number of shares subject to stock awards that can be granted in a
calendar year (as established under the 2015 Plan pursuant to Section 162(m) of the Code) and (5) the class and number of shares and exercise price, strike price or purchase price, if applicable, of all outstanding stock awards.

Corporate Transactions. Our 2015 Plan provides that in the event of certain specified significant corporate transactions, including:
(1) a sale of all or substantially all of our assets, (2) the sale or disposition of at least 90% of our outstanding securities, (3) the consummation of a merger or consolidation where we do not survive the transaction and
(4) the consummation of a merger or consolidation where we do survive the transaction but the shares of our common stock outstanding prior to such transaction are converted or exchanged into other property by virtue of the transaction, unless
otherwise provided in an award agreement or other written agreement between us and the award holder, each outstanding award will terminate and be cancelled to the extent not vested or exercised prior to the effective time of the transaction. The
administrator may instead take one or more of the following actions with respect to such stock awards: (1) arrange for the assumption, continuation or substitution of a stock award by a successor corporation, (2) arrange for the
assignment of any reacquisition or repurchase rights held by us to a successor corporation, (3) accelerate the vesting, in whole or in part, of the stock award and provide for its termination prior to the transaction, (4) arrange for the
lapse, in whole or in part, of any reacquisition or repurchase rights held by us, (5) cancel or arrange for the cancellation of the stock award prior to the transaction in exchange for a cash payment, if any, determined by the board or
(6) make a payment, in the form determined by the board, equal to the excess, if any, of the value of the property the participant would have received upon exercise of the awards prior to the transaction over any exercise price payable by the
participant in connection with the exercise. The plan administrator is not obligated to treat all stock awards or portions of stock awards, even those that are of the same type, in the same manner.

In the event of a change in control, awards granted under the 2015 Plan will not receive automatic acceleration of vesting and exercisability,
although this treatment may be provided for in an award agreement. Under the 2015 Plan, a change in control is defined to include (1) the acquisition by any person or company of more than 50% of the combined voting power of our then outstanding
stock, (2) a merger, consolidation or similar transaction in which our stockholders immediately prior to the transaction do not own, directly or indirectly, more than 50% of the combined voting power of the surviving entity (or the parent of
the surviving entity), (3) a sale, lease, exclusive license or other disposition of all or substantially all of our assets other than to an entity more than 50% of the combined voting power of which is owned by our stockholders and (4) our
stockholders approve and the Board approves a plan of complete dissolution or liquidation or a complete dissolution or liquidation of Pure Storage otherwise occurs except for a liquidation into a parent corporation.

Transferability. A participant may not transfer stock awards under our 2015 Plan other than by will, the laws of descent and
distribution or as otherwise provided under our 2015 Plan.

Plan Amendment or Termination. Our board of directors has the authority to amend, suspend
or terminate our 2015 Plan, provided that such action does not materially impair the existing rights of any participant without such participants written consent. Certain material amendments also require the approval of our stockholders. No
incentive stock options may be granted after the tenth anniversary of the date our board of directors adopted our 2015 Plan. No stock awards may be granted under our 2015 Plan while it is suspended or after it is terminated.

Acceleration Upon Death. Our 2015 Plan provides that if a participant dies while in a service relationship with us, all options and
stock appreciation rights held by the participant as of the date of death shall vest and become exercisable in their entirety and shall be exercisable by the participants estate, by a person who acquired the right to exercise the option or
stock appreciation right by bequest or inheritance, or by a person designated to exercise the option or stock appreciation right upon the participants death, but only within the period ending on the earlier of (i) the date 18 months following
the date of death (or such longer or shorter period specified in the participants award agreement), and (ii) the expiration of the term of such option or stock appreciation right as set forth in the award agreement. Further, our plan
administrator has determined that the award agreement for all other stock awards granted under our 2015 Plan will provide for full acceleration of the stock award in the event of the death of the participant holding such award while in a service
relationship with us.

2009 Equity Incentive Plan

Our board of directors adopted, and our stockholders approved, our 2009 Equity Incentive Plan, or our 2009 Plan, in October 2009. Our 2009 Plan
was amended most recently in February 2015. Our 2009 Plan allows for the grant of incentive stock options to our employees and any of our subsidiary corporations employees, and for the grant of nonstatutory stock options, restricted stock
awards to our employees, officers, directors and consultants.

Our 2015 Plan will become effective upon the execution of the underwriting
agreement related to this offering. As a result, we do not expect to grant any additional awards under the 2009 Plan following that date, although any awards granted under the 2009 Plan will remain subject to the terms of our 2009 Plan and
applicable award agreements, until such outstanding awards that are stock options are exercised, or until they terminate or expire by their terms, and until any restricted stock awards become vested, terminate or are forfeited.

Authorized Shares. The maximum number of shares of our Class B common stock that may be issued under our 2009 Plan is 97,539,696. The
maximum number of shares of Class B common stock that may be issued upon the exercise of Incentive Stock Options under our 2009 Plan is 195,079,392. Shares subject to stock awards granted under our 2009 Plan that expire or terminate without being
exercised in full or are settled in cash do not reduce the number of shares available for issuance under our 2009 Plan. Additionally, shares issued pursuant to stock awards under our 2009 Plan that we repurchase or that are forfeited, as well as
shares used to pay the exercise price of a stock award or to satisfy the tax withholding obligations related to a stock award, become available for future grant under our 2009 Plan, although such shares may not be subsequently issued pursuant to the
exercise of an Incentive Stock Option.

Plan Administration. Our board of directors or a duly authorized committee of our board of
directors administers our 2009 Plan and the stock awards granted under it. Under our 2009 Plan, the board of directors has the authority to determine and amend the terms of awards, including recipients, the exercise, purchase or strike price of
stock awards, if any, the number of shares subject to each stock award, the vesting schedule applicable to the awards, together with any vesting acceleration, and the form of consideration, if any, payable upon exercise or settlement of the award
and the terms of the award agreements for use under our 2009 Plan. The board may amend the 2009 Plan in these and other respects with the consent of any adversely affected participant, although certain material amendments to the 2009 Plan require
stockholder approval.

Under the 2009 Plan, the board of directors also has the authority to modify outstanding awards, reprice any
outstanding option, cancel any outstanding stock award in exchange for new stock awards, cash or other

consideration, or take any other action that is treated as a repricing under GAAP, although if any such action adversely affects a participant, the written consent of that participant is
required.

Corporate Transactions. Our 2009 Plan provides that in the event of certain specified significant corporate
transactions, including: (1) a sale of all or substantially all of our assets, (2) the sale or disposition of at least 90% of our outstanding securities, (3) the consummation of a merger or consolidation where we do not survive the
transaction and (4) the consummation of a merger or consolidation where we do survive the transaction but the shares of our Class B common stock outstanding prior to such transaction are converted or exchanged into other property by virtue of
the transaction, under otherwise provided in an award agreement or other written agreement between us and the award holder, each outstanding award will terminate and be cancelled to the extent not vested or exercised prior to the effective time of
the transaction. The administrator may instead take one or more of the following actions with respect to such stock awards: (1) arrange for the assumption, continuation or substitution of a stock award by a successor corporation,
(2) arrange for the assignment of any reacquisition or repurchase rights held by us to a successor corporation, (3) accelerate the vesting, in whole or in part, of the stock award and provide for its termination prior to the transaction,
(4) arrange for the lapse, in whole or in part, of any reacquisition or repurchase rights held by us or (5) make a payment, in the form determined by the board, equal to the excess, if any, of the value of the property the participant
would have received upon exercise of the stock award prior to the transaction over any exercise price payable by the participant in connection with the exercise. The plan administrator is not obligated to treat all stock awards, even those that are
of the same type, or all participants in the same manner.

In the event of a change in control, awards granted under the 2009 Plan will
not receive automatic acceleration of vesting and exercisability, although this treatment may be provided for in an award agreement. Under the 2009 Plan, a change in control is defined to include (1) the acquisition by any person of more than
50% of the combined voting power of our then outstanding stock, (2) a merger, consolidation or similar transaction in which our stockholders immediately prior to the transaction do not own, directly or indirectly, more than 50% of the combined
voting power of the surviving entity (or the parent of the surviving entity), (3) our stockholders approve or our board of directors approves a plan of complete dissolution or liquidation or a complete dissolution or liquidation of Pure Storage
otherwise occurs except for a liquidation into a parent corporation and (4) a sale, lease, exclusive license or other disposition of all or substantially all of the assets to an entity that did not previously hold more than 50% of the voting
power of our stock.

Transferability. Under our 2009 Plan, the board of directors may provide for limitations on the
transferability of awards, in its sole discretion. Option awards are generally not transferable other than by will or the laws of descent and distribution, except as otherwise provided under our 2009 Plan.

Plan Amendment or Termination. Our board of directors has the authority to amend, suspend or terminate our 2009 Plan, although certain
material amendments require the approval of our stockholders, and amendments that would impair the rights of any participant require the consent of that participant.

Acceleration Upon Death. In September 2015, our compensation committee amended substantially all options held by participants who are
in a service relationship with us to provide that if the participant holding one of such options dies while in a service relationship with us, all options held by the participant as of the date of death shall vest and become exercisable in their
entirety and shall be exercisable by the participants estate, by a person who acquired the right to exercise the option by bequest or inheritance, or by a person designated to exercise the option upon the participants death, but only
within the period ending on the earlier of (i) the date 18 months following the date of death (or such longer or shorter period specified in the participants option agreement) and (ii) the expiration of the term of such option as set
forth in the option agreement.

2015 Employee Stock Purchase Plan

Our board of directors adopted, and our stockholders approved, our 2015 Employee Stock Purchase Plan, or ESPP, in August 2015. The ESPP will
become effective immediately upon the execution and delivery of the

underwriting agreement related to this offering. The purpose of the ESPP is to secure the services of new employees, to retain the services of existing employees and to provide incentives for
such individuals to exert maximum efforts toward our success and that of our affiliates. The ESPP is intended to qualify as an employee stock purchase plan within the meaning of Section 423 of the Code for U.S. employees.

Share Reserve. Following this offering, the ESPP authorizes the issuance of 3,500,000 shares of our Class A common stock
pursuant to purchase rights granted to our employees or to employees of any of our designated affiliates. The number of shares of our Class A common stock reserved for issuance will automatically increase on February 1st of each calendar
year, from February 1, 2016 (assuming the ESPP becomes effective in fiscal year ending January 31, 2016) through February 1, 2025, by the lesser of (1) 1% of the total number of shares of our common stock outstanding on the last
day of the calendar month prior to the date of the automatic increase, and (2) 3,500,000 shares; provided that prior to the date of any such increase, our board of directors may determine that such increase will be less than the amount set
forth in clauses (1) and (2). As of the date hereof, no shares of our common stock have been purchased under the ESPP.

Administration. Our board of directors has delegated its authority to administer the ESPP to our compensation committee. The ESPP is
implemented through a series of offerings under which eligible employees are granted purchase rights to purchase shares of our common stock on specified dates during such offerings. Under the ESPP, we may specify offerings with durations of not more
than 27 months, and may specify shorter purchase periods within each offering. Each offering will have one or more purchase dates on which shares of our common stock will be purchased for employees participating in the offering. We currently intend
to have 24-month offerings with multiple purchase periods (of approximately six months in duration) per offering, except that the first purchase period under our first offering may be shorter or longer than six months, depending on the date on which
the underwriting agreement relating to this offering becomes effective. An offering under the ESPP may be terminated under certain circumstances.

Payroll Deductions. Generally, all regular employees, including executive officers, employed by us or by any of our designated
affiliates, may participate in the ESPP and may contribute, normally through payroll deductions, up to 30% of their earnings (as defined in the ESPP) for the purchase of our common stock under the ESPP. Unless otherwise determined by our board of
directors, common stock will be purchased for the accounts of employees participating in the ESPP at a price per share that is not less than the lesser of (1) 85% of the fair market value of a share of our common stock on the first date of an
offering or (2) 85% of the fair market value of a share of our common stock on the date of purchase. For the initial offering, which we expect will commence upon the execution and delivery of the underwriting agreement relating to this
offering, the fair market value on the first day of the offering period will be the price at which shares are first sold to the public.

Limitations. Employees may have to satisfy one or more of the following service requirements before participating in the ESPP, as
determined by our board of directors, including: (1) being customarily employed for more than 20 hours per week, (2) being customarily employed for more than five months per calendar year or (3) continuous employment with us or one of
our affiliates for a period of time (not to exceed two years). No employee may purchase shares under the ESPP at a rate in excess of $25,000 worth of our common stock based on the fair market value per share of our common stock at the beginning of
an offering for each year such a purchase right is outstanding and the maximum number of shares an employee may purchase during a single purchase period is 3,000. Finally, no employee will be eligible for the grant of any purchase rights under
the ESPP if immediately after such rights are granted, such employee has voting power over 5% or more of our outstanding capital stock measured by vote or value pursuant to Section 424(d) of the Code.

Changes to Capital Structure. In the event that there occurs a change in our capital structure through such actions as a stock split,
merger, consolidation, reorganization, recapitalization, reincorporation, stock dividend, dividend in property other than cash, large nonrecurring cash dividend, liquidating dividend, combination of shares, exchange of shares, change in corporate
structure or similar transaction, the board of directors will make appropriate adjustments to (1) the number of shares reserved under the ESPP, (2) the maximum number of shares

by which the share reserve may increase automatically each year, (3) the number of shares and purchase price of all outstanding purchase rights and (4) the number of shares that are
subject to purchase limits under ongoing offerings.

Corporate Transactions. In the event of certain significant corporate
transactions, including: (1) a sale of all or substantially all of our assets, (2) the sale or disposition of 90% of our outstanding securities, (3) the consummation of a merger or consolidation where we do not survive the transaction
and (4) the consummation of a merger or consolidation where we do survive the transaction but the shares of our common stock outstanding immediately prior to such transaction are converted or exchanged into other property by virtue of the
transaction, any then-outstanding rights to purchase our stock under the ESPP may be assumed, continued or substituted for by any surviving or acquiring entity (or its parent company). If the surviving or acquiring entity (or its parent company)
elects not to assume, continue or substitute for such purchase rights, then the participants accumulated payroll contributions will be used to purchase shares of our common stock within 10 business days prior to such corporate transaction, and
such purchase rights will terminate immediately.

ESPP Amendment or Termination. Our board of directors has the authority to amend
or terminate our ESPP, provided that except in certain circumstances such amendment or termination may not materially impair any outstanding purchase rights without the holders consent. We will obtain stockholder approval of any amendment to
our ESPP as required by applicable law or listing requirements.

401(k) Plan

We maintain a tax-qualified retirement plan that provides eligible U.S. employees with an opportunity to save for retirement on a tax
advantaged basis. Eligible employees are able to defer eligible compensation up to certain Code limits, which are updated annually. We have the ability to make matching and discretionary contributions to the 401(k) plan but have not done so to date.
Employee contributions are allocated to each participants individual account and are then invested in selected investment alternatives according to the participants directions. Employees are immediately and fully vested in their own
contributions. The 401(k) plan is intended to be qualified under Section 401(a) of the Code, with the related trust intended to be tax exempt under Section 501(a) of the Code. As a tax-qualified retirement plan, contributions to the 401(k)
plan are deductible by us when made, and contributions and earnings on those amounts are not taxable to the employees until withdrawn or distributed from the 401(k) plan.

Insurance Premiums

We pay premiums for medical insurance and dental insurance for all full-time employees, including our named executive officers. We also pay
premiums for life insurance and long-term disability insurance benefits for all full-time employees, including our named executive officers. We also offer high deductible plan options that include a healthcare flexible spending account component for
all full-time employees, including our named executive officers. These benefits are available to all full-time employees, subject to applicable laws.

Limitations on Liability and Indemnification Matters

Upon the closing of this offering, our amended and restated certificate of incorporation will contain provisions that limit the liability of
our current and former directors for monetary damages to the fullest extent permitted by Delaware law. Delaware law provides that directors of a corporation will not be personally liable for monetary damages for any breach of fiduciary duties as
directors, except liability for:



any breach of the directors duty of loyalty to the corporation or its stockholders;



any act or omission not in good faith or that involves intentional misconduct or a knowing violation of law;

unlawful payments of dividends or unlawful stock repurchases or redemptions; or



any transaction from which the director derived an improper personal benefit. Such limitation of liability does not apply to liabilities arising under federal securities laws and does not affect the availability of
equitable remedies such as injunctive relief or rescission.

Our amended and restated certificate of incorporation will
authorize us to indemnify our directors, officers, employees and other agents to the fullest extent permitted by Delaware law. Our amended and restated bylaws will provide that we are required to indemnify our directors and officers to the fullest
extent permitted by Delaware law and may indemnify our other employees and agents. Our amended and restated bylaws will also provide that, upon satisfaction of certain conditions, we shall advance expenses incurred by a director or officer in
advance of the final disposition of any action or proceeding, and permit us to secure insurance on behalf of any officer, director, employee or other agent for any liability arising out of his or her actions in that capacity regardless of whether we
would otherwise be permitted to indemnify him or her under the provisions of Delaware law. We have entered and expect to continue to enter into agreements to indemnify our directors, executive officers and other employees as determined by the board
of directors. With certain exceptions, these agreements provide for indemnification for related expenses including, among other things, attorneys fees, judgments, fines and settlement amounts incurred by any of these individuals in any action
or proceeding. We believe that these amended and restated certificate of incorporation and amended and restated bylaw provisions and indemnification agreements are necessary to attract and retain qualified persons as directors and officers. We also
maintain customary directors and officers liability insurance.

The limitation of liability and indemnification provisions in
our amended and restated certificate of incorporation and amended and restated bylaws may discourage stockholders from bringing a lawsuit against our directors for breach of their fiduciary duty. They may also reduce the likelihood of derivative
litigation against our directors and officers, even though an action, if successful, might benefit us and other stockholders. Further, a stockholders investment may be adversely affected to the extent that we pay the costs of settlement and
damage awards against directors and officers as required by these indemnification provisions.

At present, there is no pending litigation
or proceeding involving any of our directors, officers or employees for which indemnification is sought and we are not aware of any threatened litigation that may result in claims for indemnification.

Insofar as indemnification for liabilities arising under the Securities Act of 1933, as amended, may be permitted for directors, executive
officers or persons controlling us, we have been informed that, in the opinion of the SEC, such indemnification is against public policy as expressed in the Securities Act and is therefore unenforceable.

Rule 10b5-1 Sales Plans

Our
directors and officers may adopt written plans, known as Rule 10b5-1 plans, in which they will contract with a broker to buy or sell shares of our Class A and Class B common stock on a periodic basis. Under a Rule 10b5-1 plan, a broker executes
trades pursuant to parameters established by the director or officer when entering into the plan, without further direction from them. The director or officer may amend a Rule 10b5-1 plan in some circumstances and may terminate a plan at any time.
Our directors and executive officers also may buy or sell additional shares outside of a Rule 10b5-1 plan when they are not in possession of material nonpublic information, subject to compliance with the terms of our insider trading policy. Prior to
181 days after the date of this offering, the sale of any shares under such plan would be subject to the lock-up agreement that the director or officer has entered into with the underwriters.

The following is a summary of transactions since February 1, 2012 to which we have been a participant, in which the amount involved
exceeded or will exceed $120,000 and in which any of our directors, executive officers or holders of more than 5% of our capital stock, or any member of the immediate family of the foregoing persons, had or will have a direct or indirect material
interest, other than compensation and other arrangements that are described in the section titled Executive Compensation or that were approved by our compensation committee.

We believe the terms obtained or consideration that we paid or received, as applicable, in connection with the transactions described below
were comparable to terms available or the amounts that would be paid or received, as applicable, in arms-length transactions.

Sales of Preferred
Stock

In August 2012, we issued an aggregate of 10,584,066 shares of our Series D preferred stock at a purchase price of $3.7713 per
share for an aggregate purchase price of $39.9 million. In August, September and October 2013 and June, September and November 2014, we issued an aggregate of 24,761,984 shares of our Series E preferred stock at a purchase price of $6.9315 per share
for an aggregate purchase price of $171.6 million. In April 2014, we issued an aggregate of 14,307,603 shares of our Series F preferred stock at a purchase price of $15.7259 per share for an aggregate purchase price of $225.0 million. The following
table summarizes purchases of preferred stock by holders of more than 5% of our capital stock and their affiliated entities and our directors. None of our executive officers purchased shares of preferred stock.

Name

Series DPreferredStock

Series E PreferredStock

Series F PreferredStock

Aggregate Purchase Price

Entities affiliated with Redpoint Ventures(1)

1,325,784

1,046,796

635,893

$

22,255,829

Entities affiliated with Greylock(2)

1,839,660

3,204,872

1,589,734

54,152,539

Entities affiliated with Index Ventures(3)

3,977,376

1,580,232

1,271,787

45,953,383

Entities and individuals affiliated with Sutter Hill Ventures(4)

2,918,502

5,110,470

2,543,574

86,429,857

(1)

Includes shares of preferred stock purchased by Redpoint Ventures IV, L.P. and Redpoint Associates IV, LLC. Mr. Dharmaraj, a former member of our board of directors, is a partner at Redpoint Ventures.

(2)

Includes shares of preferred stock purchased by Greylock XIII Limited Partnership, Greylock XIII-A Limited Partnership and Greylock XIII Principals LLC. Mr. Bhusri, a member of our board of directors, is a partner
at Greylock.

Includes shares purchased by Sutter Hill Ventures, shares purchased by Mr. Speiser and entities affiliated with Mr. Speiser, and shares purchased by individuals other than Mr. Speiser who are
affiliated with Sutter Hill Ventures or entities affiliated with such individuals. Mr. Speiser, a member of our board of directors, is a Managing Director at Sutter Hill Ventures. Mr. Speiser may also be deemed to have shared voting and
investment power with respect to the shares purchased by Sutter Hill Ventures.

Upon the closing of this offering, each
share of preferred stock will convert into one share of Class B common stock. For a description of the material rights and privileges of the preferred stock, please see Note 7 to our consolidated financial statements included elsewhere in this
prospectus.

2013 Tender Offer

In
November 2013, we repurchased an aggregate of 3,045,634 shares of our outstanding Class B common stock at a purchase price of $6.9315 per share for an aggregate purchase price of $21.1 million, of which 557,842 shares of common stock were
repurchased from David Hatfield, our President, for an aggregate price of $3.9 million. Mr. Hatfield was the only executive officer to participate in this tender offer.

In July 2014, we repurchased an aggregate of 3,803,336 shares of our outstanding Class B common stock at a purchase price of $15.7259 per share
for an aggregate purchase price of $59.8 million. The following table summarizes our repurchases of common stock from our directors and executive officers in this tender offer.

Name

Shares ofCommonStock

Purchase Price

Scott Dietzen(1)

192,051

$

3,020,174

John Colgrove(2)

200,000

3,145,180

David Hatfield(3)

1,000,000

15,725,900

(1)

Dr. Dietzen is our Chief Executive Officer and a member of our board of directors.

(2)

Mr. Colgrove is our Chief Technology Officer and a member of our board of directors.

(3)

Mr. Hatfield is our President.

Investor Rights Agreement

In April 2014, we entered into an amended and restated investor rights agreement with certain holders of our outstanding preferred stock,
including Mike Speiser and Frank Slootman (members of our board of directors) and entities affiliated with Greylock Partners, Index Ventures, Redpoint Ventures and Sutter Hill Ventures, with certain registration rights, including the right to demand
that we file a registration statement or request that their shares be covered by a registration statement that we are otherwise filing. Aneel Bhusri, Michelangelo Volpi and Mike Speiser, members of our board of directo